Noah was the boys name of the day on the MN baby name finder today :) According to that Noah goes well with "Paige, Lorelei, Melinda, Finbarr, Cassidy, John, Archie, Herbe, Jago, Dylan, Inigo, Luke, James"
If you like Ella you could maybe have Emma, Emily, Eloise, Ellie, Helena, Bella, Isabella, Nell? The name finder suggests Maria, Mary and Mae. For Freya it suggests Farrah, Mai, Scarlett, Isaac, Archie, Elizabeth, Charlotte, Grace (apparently Freya is a boys name too)
And of course you can never go wrong with Alexander or Catherine 