Girl name origins & meanings
- Irish : Secluded wooded valley
Family name origins & meanings
- Welsh and Cornish : topographic name for someone who lived in a valley, Welsh glyn, Cornish glin, or a habitational name from a place named with this word. Morgan proposes Glynllifon in Caernarfon as a probably source of the Welsh surname.
- Irish : reduced form of Gaelic Mag Fhloinn (see McGlynn).