The name Tesho (Тешо) could be South-Slavic (Bulgarian, Serbian, Bosnian, Croatian, ..).

http://www.imenata.com/name-view-1661.html

The above site claims that the name Tesho is abbreviation of Uteshen/Uteshan which means Consolated.

This site (BTN) gives Arabic origin of the name Shama. The Turkish word şamar (meaning cuff, slap in the face; also a loanword in Bulgarian) could also be an origin of the last name Shama, after shortening.