From The Collaborative International Dictionary of English v.0.48:
Omber \Om"ber\, Ombre \Om"bre\, n. [F. hombre, fr. Sp. hombre,
lit., a man, fr. L. homo. See Human.]
A game at cards, borrowed from the Spaniards, and usually
played by three persons. --Pope.
[1913 Webster]
When ombre calls, his hand and heart are free,
And, joined to two, he fails not to make three.
--Young.
[1913 Webster]