Sanigar is an English surname originating in the Gloucestershire region of England. Documented alternative spellings include Saniger, Sanniger, Senigar and Sinnegar.
The name is medieval and probably derives from a location originally called Swan Hangra near Newtown, Berkeley on the Severn bank, meaning “the place of swans by the sloping wood”,[1] which evolved into Sanigar and variants over time.
http://www.ancestry.co.uk/name-origin?surname=sanigar