Yima

Origin: Avestan

Meaning: the ancient Avestan form of Persian Jam (a short form of Jamshid), meaning either “twin” or “river”. In all honesty, however, I could find little information about the name’s etymology with the exception of Behind the Name and Wikipedia.

Yima is not a name found in A Series of Unfortunate Events– there were no Y names I could find so I just chose one myself.