Where does “tree-hiaghtinoil” come from?
tree-hiaghtinoil (Manx) comes from Manx shiaghtin, 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.
tree-hiaghtinoil (Manx): tri-weekly
Ancestry of “tree-hiaghtinoil”, step by step