sibling names

My son is called Rayven Midnight, he is named after my dad Ray. so spelled raven with a 'y' in it. I just loved midnight it was the name of my cat! Lol. I'm with a new partner now and were having a girl. Were naming her Wren Sapphire. we love the name Wren and sapphire after a dear friend plus we both love blue. I didn't realise straight away that both children are named after birds. plus both middle names are shades of blue. midnight blue sapphire blue. I love how well they go together although didn't plan it that way. Have you linked your children's names? ie same starting letter ? same amount of letters etc...?