Yasha is a Russian variant transcription of Jacob (Dutch, English, German, and Scandinavian).
Yasha is also a Russian diminutive form of Yakov (Russian, Hebrew, and Slavic).
Yasha is not regularly used as a baby name for boys. It is not listed in the top 1000 names. In 2016, out of the group of boy names directly linked to Yasha, Jacob was the most frequently used.
† approx English pronunciation for Yasha: Y as in "you (Y.UW)" ; AH as in "mud (M.AH.D)" ; SH as in "she (SH.IY)"