What is the origin of the last name Jentsch?

Question:Jentsch is a diminutive form of John.
John is one of the most popular of the medieval names, and took several forms even in medieval times. John derived from Hebrew Yochanan (God has favoured me with a son). Jahncke (J?hncke) is a diminutive form of the German (of Slavic origin) cognate of John, including Jann, Jahn
(Low German).
Other diminutive forms include
Johnikin, Johnigan, Jonikin, Jonigan (English/Irish);
Jeannet, Jeanet, Joannet, Jouandet, Jeandet, Jantet, Jentet, Jouanneton, Jeannin, Jouannin, Jouanny, Jany, Janny, Jeandin, Jentin, Jeannenet, Jeannot, Jouanot, Jeandon, Janton, Jenton, Jeannel, Jeandel, Jantel, Jeanneau, Jeandeau, Jenteau, Jeannequin, Jannequin, Johanchon , (French);
Giovannelli, Gianelli, Giovannilli, Gianiello, Gianilli, Cianelli, Iannelli, Ianello, Ianniello, Iannilli, Zannelli, Zuanelli, Zuenilli, Vannelli, Nanelli, Giovannetti, Ninotti, Zanetello, Zanettini, Nannini, Notti, Noto (Italian);
J?hnel, J?hne, J?ne, J?hndel, J?hnel (German);
Juanico (Spain);
Johnke, J?nke, Jenne, Jennemann (Low German);
Jansema (Frisian);
J?hncke, J?ncke, J?nke, Jahnisch, Janisch, Jansch, Jannuscheck, Janoschek, Jenicke, Jentzsch, JENTSCH, Genicke, Genike, Gentzsch, Gentsch, Wahnncke, Wanka, Wanjek, Wandtke, Nuschke, Nuscha (German of Slav origin).

Best Answer - Chosen by Asker: Jentsch is a diminutive form of John.
John is one of the most popular of the medieval names, and took several forms even in medieval times. John derived from Hebrew Yochanan (God has favoured me with a son). Jahncke (J?hncke) is a diminutive form of the German (of Slavic origin) cognate of John, including Jann, Jahn
(Low German).
Other diminutive forms include
Johnikin, Johnigan, Jonikin, Jonigan (English/Irish);
Jeannet, Jeanet, Joannet, Jouandet, Jeandet, Jantet, Jentet, Jouanneton, Jeannin, Jouannin, Jouanny, Jany, Janny, Jeandin, Jentin, Jeannenet, Jeannot, Jouanot, Jeandon, Janton, Jenton, Jeannel, Jeandel, Jantel, Jeanneau, Jeandeau, Jenteau, Jeannequin, Jannequin, Johanchon , (French);
Giovannelli, Gianelli, Giovannilli, Gianiello, Gianilli, Cianelli, Iannelli, Ianello, Ianniello, Iannilli, Zannelli, Zuanelli, Zuenilli, Vannelli, Nanelli, Giovannetti, Ninotti, Zanetello, Zanettini, Nannini, Notti, Noto (Italian);
J?hnel, J?hne, J?ne, J?hndel, J?hnel (German);
Juanico (Spain);
Johnke, J?nke, Jenne, Jennemann (Low German);
Jansema (Frisian);
J?hncke, J?ncke, J?nke, Jahnisch, Janisch, Jansch, Jannuscheck, Janoschek, Jenicke, Jentzsch, JENTSCH, Genicke, Genike, Gentzsch, Gentsch, Wahnncke, Wanka, Wanjek, Wandtke, Nuschke, Nuscha (German of Slav origin).

German

I would say German.