1º_ Jay is a male name of French origin (the feminine is Jaye) that possibly comes from the Latin Gaius (for "gay, cheerful"). 2º_ It is also a hypocoristic for names that begin with the letter /J/, although this comes more from English. 3º_ As there are words very similar to this in different languages, anyone could originate a name adopted by Spanish speakers, such as the cachiquel jay ("house"), or the Jay for woman from jai ("young woman") from caló chai ("girl"), also the Basque jai ("party") could end up becoming a name, not to mention more distant languages such as Greek, Arabic, Hebrew or Sanskrit.