Is it possible that Shimkha is Simcha? Kha would be the gutteral h as in Simcha and the letter Shin is exactly like the letter Sin only with a dot on top to the right instead of the left. The question is whether the spelling is Sin,mem,chet,hey, as opposed to Shin,mem,chet,hey. Simcha means," Happy".<snip>
The name Shimkha, "sounds" more like a nickname for Shimon.