This name is apparently BENGTSON; "son of BENGT" and is found in variations as BENTSON, BENGSON, BENSON.
1880 Lemont, Cook County, Illinois ED 205 page 58, #515 #529 19 June 1880, Age: Occupation: b.p. Father: Bengson, Carl head 53 quarry labor Sweden Sweden Sweden Mother: Johanna wife 33 Sweden Sweden Sweden