Where does “seachtanán” come from?
seachtanán (Irish) comes from Irish seachtain, from Old Irish sechtmain, from Latin septimāna, from Latin septimānus, from Latin septimus, from Latin Septem, from Proto-Italic septem, from Proto-Indo-European septḿ̥ — seven.
seachtanán (Irish): weekly
Ancestry of “seachtanán”, step by step