The name Llyr is a boy's name of Welsh origin meaning "the sea". Llyr and is often added to user-created lists like 'L' names and discussed in our forums with posts like "Names on NB that make you go WOW!".
From the experts:
Llyr is a name with a great meaning and a lovely sound, but that sound is going to be next to impossible to get non-Welsh speaking people to pronounce (google the double L sound in Welsh). If you are outside Wales, you may wish to consider the Irish alternative Lir, which has the same meaning and an easier sound.