Save Gender Masculine Usage Irish Pronounced Pron. /t̪ˠə.mˠɑː.ˈʃiːnʲ/, /ˈt̪ˠʊ.mˠɑː.ʃiːnʲ/, /ˈt̪ˠʊ.mˠæ.ʃinʲ/ [key·simplify] Meaning & History Diminutive of Tomás.