Esperanto grammar Part of Chapter 23

CEFR B1

6 min read

Test yourself (16 questions)

Personal Names in Esperanto: Johano, John or Ĝon?

By Michael McGettrickUpdated 12 October 2026

A name in can be written three ways, and the accepts all three. Fully Esperantised with an -o, respelt in Esperanto letters with no ending, or left exactly as its owner writes it.

full esperantigopartialoriginal spellingWhat do the colours mean?
SystemExampleWhat happens
fullKonfuceo, Nov-JorkoEsperanto letters and -o
partialZamenhof, Ban Ki-mun letters, no ending
originalKálmán Kalocsayas its owner writes it

Quick check

Now use it: three quick questions on the chart above. The full practice is further down.

Pick the right one

0/3

Choose the accusative form that PMEG allows.

  1. Ĉu vi konas ? (Anna: the name ends in a vowel)

  2. Ĉu vi konas ? (Elisabeth: it ends in a consonant)

  3. Mi vidis . (Johano: a fully Esperantised name)

These are the Akademio's own examples, from its 2013 recommendation.

  • Nov-Jorko. - I lived in New York.
  • Kalocsay. - I am reading a book by Kalocsay.

What Zamenhof did

the -o endingWhat do the colours mean?

The people in the Fundamento's o all have Esperanto names ending in -o:

EkzercaroNames
§5 to §10Teodoro, Johano, Ludoviko, Aleksandro, Ernesto
§18 to §22Petro, Stefano, Nikodemo, Jozefo
§36 to §39Anno, Elizabeto, Mario, Klaro, Sofio, Berto
  • Johano Petro . - Johano and Petro are friends.

Women's names take -o too. In the , Mary is Mario. Today you also meet Maria, Sofia and Berta. PMEG says the Fundamento's -o is the model, but -a women's names are very widespread and must be tolerated; an -a is entirely fine when the national form already ends in -a, because the name then counts as not Esperantised. For Mary it lists three options:

FormWhat it is
Mariothe Fundamento's form
o-- added, since Mario is also a man
Marianot Esperantised

Zamenhof stopped halfway with surnames. In §12 George Washington is Georgo Vaŝington: the given name Esperantised, the surname respelt with no ending. He wrote his own name the same way, Zamenhof, with no -o.

Three systems, and no single rule

The Akademio's ( 22, 10 October 2013) replaced its 1989 recommendations. It names the three systems, and then declines to choose:

... an .

...it is not possible now to recommend one single method, always to be used, for treating different proper names in Esperanto.

  • Esperanto, 2013

It does lean one way, with modern examples: Vindozo (Windows), Linukso (Linux), Guglo (Google).

i .

It is worth continuing to cultivate and support the habit of fully Esperantising frequently used proper names.

  • Esperanto, 2013

And it settles the question learners ask first:

kiuforme .

Every Esperantist may decide for themselves in what form to use their name in an Esperanto setting.

  • Esperanto, 2013

A footnote on Zamenhof and Vaŝington. The 1974 Eighth Official Addition had read these two spellings as full names with the ending silently dropped. In 2013 the annulled that reading: they are simply partly Esperantised.

Who gets which

full esperantigopartialoriginal spellingWhat do the colours mean?

Usage leans by who the person is:

WhoUsual formExample
a historical figurefull Cezaro
a name in daily usefull, encouragedGuglo, Vindozo
an their own choiceMikaelo or Michael
a surnameoften left eKalocsay
  • Mikaelo. - My name is Mikaelo.

Often only the given name is Esperantised and the surname kept: PMEG's example is Christeno Pedersen.

Esperanto has no compulsory rules for capitals (PMEG: majuskloj minuskloj ), so a surname printed in capitals, as in Kálmán KALOCSAY on a congress list or badge, is a convention for showing which name is the family name, not a rule. Capital letters has the rest.

The accusative on a foreign name

the -n endingWhat do the colours mean?

An Esperantised name ends in -o, so it takes -n like any noun:

  • Johanon. - I know Johano.

A name in its original spelling has no -o to hang the -n on. PMEG gives four ways out:

The nameWhat to doExample
ends in a voweladd -n Annan?
ends otherwiseadd -, often hyphenated Elisabeth-?
clear from orderleave it offElizabeto Peter.
has a titlethe title takes -n Vigdís
  • Annan? - Do you know Anna?
  • Bertan. - I saw Berta.
  • Elizabeto Peter. - Elizabeto saw Peter.

Leaving it off works when the other name shows the roles. Elizabeto is fully Esperantised and has no -n, so it can only be the subject, and Peter must be the object:

Subject
Verb
Object
Elizabeto
Peter
Vigdís

Names in two parts

the -n endingWhat do the colours mean?

Every Esperanto -o word in a name takes the -n; a part left in its original spelling does not:

NameAs an objectWhy
Jesuo KristoJesuon Kristonboth parts end in -o
Christeno PedersenChristenon Pedersenonly the given name
Jozefo WasniewskiJozefon Wasniewskithe surname stays as it is
  • Christenon Pedersen. - I met Christeno Pedersen.

PMEG adds that Christenon Pedersen rather than Christenon Pedersenon is a habit, not a rule.

Joĉjo and Manjo: pet names

-ĉj- (for a man)-nj- (for a woman)What do the colours mean?

Two suffixes make pet names: -- for a man and -- for a woman. The says they go after the first one to five letters of the given name. The Fundamento's §38 works through a family:

NamePet names
JohanoJohanĉjo, Joĉjo
NikolaoNikolĉjo, Niĉjo
VilhelmoVilĉjo, Viĉjo
MarioManjo, Marinjo
KlaroKlanjo
SofioSonjo, Sofinjo
  • Manjo. - Her parents call her Manjo.

How far you cut is taste: the gives several forms and does not rank them.

The same suffixes work on family words. PMEG lists these:

A friendly family tree drawn on a big green tree: the grandmother and grandfather at the top; below them their son (the father) with the mother beside him, and the father's brother (the uncle); at the bottom, the parents' two children, a smiling girl with a sparkle and her younger brother.
  1. avoĉjo
  2. oĉjo

Avoĉjo (grandad), panjo (mum), paĉjo (dad) and oĉjo (uncle): -ĉj- for each man, -nj- for the woman.

WordPet formEnglish
dad
mum
oĉjouncle
onjoauntie
fraĉjobrother
franjosister

is short, so PMEG adds -- to the whole word: o.

Mistakes English speakers make

the -n ending-nj- (for a woman)What do the colours mean?
WrongRightWhy
Johano. Johanon.an -o name takes -n
Elisabethn Elisabeth-after a consonant: -
Vigdíson Vigdísthe title takes it
Maĉjo (for Mario)Manjo-- for a woman

What to do next

  1. Decide what you will call yourself in Esperanto, and use it.
  2. Build a pet name for three people you know, with the right suffix.
  3. Read the accusative again with names in mind.

See also

Practise: test yourself

Sort into groups

0/5

Which system is each name written in?

Tap a word, then the group it belongs in.

Pick the right one

0/4

Choose the accusative form that PMEG allows.

  1. Ĉu vi konas ? (Anna: the name ends in a vowel)

  2. Ĉu vi konas ? (Elisabeth: it ends in a consonant)

  3. Mi vidis . (Johano: a fully Esperantised name)

  4. Li renkontis Vigdís. (the title carries it)

Build the word

0/4

Build the pet name from its pieces.

  1. Johano, for a boy

    Accents optional - cx, gx, ux work for ĉ, ĝ, ŭ

    Your word is empty.

  2. Mario, for a girl

    Accents optional - cx, gx, ux work for ĉ, ĝ, ŭ

    Your word is empty.

  3. patro: dad

    Accents optional - cx, gx, ux work for ĉ, ĝ, ŭ

    Your word is empty.

  4. patrino: mum

    Accents optional - cx, gx, ux work for ĉ, ĝ, ŭ

    Your word is empty.

Spot the mistake

0/3

Tap the word that is wrong.

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Frequently asked questions

Should I Esperantise my own name?
It is your choice, and the Esperanto says so: its 2013 recommendation on proper names states that every Esperantist may decide what form of their name to use in an Esperanto setting. Some speakers use a full Esperanto form (Mikaelo), some keep their passport spelling (Michael), and many Esperantise only the given name. An Esperanto form is easy for anyone to pronounce and takes -n like any noun; the original spelling matches your documents. Pick one and use it consistently.
How do you put the accusative on a foreign name in Esperanto?
PMEG gives several ways. A name ending in a vowel can take -n directly: Annan? Any other name can take -on, often after a hyphen: Elisabeth-on? You may also leave the ending off when word order makes the meaning clear: Elizabeto Peter. Or a title or noun in front can carry it: Vigdís Finnbogadóttir. Avoid two unmarked foreign names either side of one verb, because then only word order shows who did what.
What are Joĉjo and Manjo?
Pet names, built with two suffixes from the : -ĉj- for a man and -nj- for a woman. The says they go after the first one to five letters of the given name. The Fundamento's own examples include Johano to Joĉjo, Vilhelmo to Vilĉjo, Mario to Manjo and Sofio to Sonjo. The same suffixes give (dad) from and (mum) from .
Do Esperanto surnames take endings?
Often not: frequently only the given name is Esperantised and the surname stays as its owner writes it, so only the given name takes -n: Christenon Pedersen, in PMEG's example. PMEG adds that this is a habit, not a rule. A name made of Esperanto words all the way through takes -n on every part: Jesuon Kriston.
Why do some books say Konfuceo and others Kong Fuzi?
Because both systems are legitimate. The Akademio's 2013 recommendation accepts full Esperantisation, partial Esperantisation and the original spelling, and says no single method can be recommended for every case. It does encourage keeping the habit of fully Esperantising names in frequent use, and its examples are modern: Vindozo, Linukso and Guglo. Historical figures are the names most often fully Esperantised.