seonidh Share definition Flag a very, very rare name. You don't come upon a girl named Seonidh very often. It's pronounced 'Show-na' My best friends name is Seonidh. She's VERY hot and cool. seonidh by inhalesharpies June 17, 2021 0 0 Get merch Get the seonidh mug. Buy Now — $32.95 See more merch