TBESG
γενέσια, -ων, τά, neut. pl. of adj. -ιος, -ον, relating to birth (< γένεσις);
__1. in Attic Gk., a commemoration of the dead.
__2. In late Gk., a birthday feast (= cl. γενέθλια; so in π., see MM, Exp., x; cf. also Ῥutherford, NPhr., 184): Mat.14:6, Mrk.6:21.
† (AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars