My daughter is Niamh Mary. It was always Mary. It's the middle name of myself, my mother, my gran, my OH's mum and is the name of 2 of his aunts etc etc etc.
She was going to be either Caoimhe or Niamh. Because we wanted something Irish to go with her last name (my OH is from Donegal) in the end it came down to the mythology behind Niamh. She was the queen of Tir Na Nog which is kind of a 'perfect place', which is what I wanted out of life for her. So Niamh it was.
Other names we had were
Aideen
Orlaith
Nessa
Caragh
For boys, I don't care what my OH says, he will be called Joseph John.