The etymology for surgeon is beautiful:
c.1300, from Anglo-French surgien (13c.), from Old French serurgien, cirurgien, from cirurgie “surgery,” from Latin chirurgia, from Greek kheirourgia, from kheirourgos “working or done by hand,” from kheir “hand” (see chiro-) + ergon “work” (see urge (v.)).
The first root, “hand,” is related to chirality and chiropractor. The second root, “work,” is related to George. Ge(o) “earth” + ergon “work” = earth worker. A farmer.