All my characters are left-handed. Didn't Gygax say that in 1e, to just assume that if the player is- the PC is. None of them were as cool as Warduke though.
Found one! In the Ivid the Undying supplement, Marcenn Simraith is a ranger in the Lone Heath who is described as fighting "with a short sword of quickness in his dominant left hand and a dagger +3 in the other."