Green’s Dictionary of Slang

one who takes a share of the booty.

1530		Palsgrave Lesclarcissement de la Langue Francoyse n.p.: Substances: Botyfelowe, parsomnet.
1552		G. Walker (?) Detection of Vyle and Detestable Use of Dice Play (1850) 43: As when one man lost an hundred pound land at shooting, by occasion that some that shot with him on his side were booty fellows against him.
1890–1904		Farmer & Henley Sl. and Its Analogues.