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]