Jamin is of Hebrew origin and means "right hand". It's also a variant of the name Jamison, which means "supplanter" in Scottish. The name Jamin was popularized by American writer Thomas Wolfe, who used it for one of his characters in his novel "You Can't Go Home Again".
"Jamin experienced its peak popularity in 1986 with 12 births that year. The name's usage has been consistently low since 1995, with only a handful of births each year."