艾伦(ài lún) - Allen, Alan, Ellen (transliterated name) in Mandarin

艾伦 (Ài lún) is how Chinese writes the English names Allen, Alan and Ellen. It is a transliteration, so the characters are picked for their sound and the meanings behind them do nothing.

It is high frequency in subtitles rather than in conversation, because a great many dubbed and subtitled films have an Allen in them. Recognising it on the page matters more than producing it, though you will need it the moment you introduce a colleague of that name.

The useful lesson is the pattern rather than this one name. Foreign names get sounded out syllable by syllable into fixed character strings, and the strings are conventional: everybody writes Allen as 艾伦, so inventing your own characters will simply confuse people. If your name has a standard Chinese form, learn that form.