O'Sullivan
b. about 1840 d. 1882
American

Oeben
b. 1721 d. 1763; master 1761
French

d'Oggiono
b. 1467, d. 1524
Italian

Oionokles Ptr
active: about 470 B.C.
Greek

Olivetan Mstr
active: about 1425 - about 1450
Italian

Oltos
active: about 525 B.C. - 500 B.C.
Greek

Onesimos
active: about 500 B.C. - 480 B.C.
Greek

Oppenord
b. 1672 d. 1742
French

Oppenordt
b. 1639, d. 1715
French; Dutch

Opstal
b. 1594 or 1604 d. 1668
Flemish