and RUMI'NA, three Roman genii, who were worshipped as the protectors of infants sleeping in their cradles, and to whom libations of milk were offered. Cunae signifies a cradle, and ruma or rumis was in ancient Latin the same as mamma, a mother's breast. (August. de Civit. Dei, 4.10, &c.; Lactant. 1.20, 36; Varro, apud Non. p. 167, apud Donat. ad Terent. Phorm. i. 1. 14.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890