baby boy and girl names

Shannon • mummy to Amelia♡
I can only come up with one of each. And none of my family members like them. Pointless asking my boyfriend because all I get back is I don't know. ( he's useless) 
Any way for a boy 
Kaiden? Don't know about middle name 
For a girl 
Maci-Jayne 
Are they stupid? 
Can any of you think of any decent names that will go with the surnames Seymour and Mitchell ( thinking of having both of our surnames in so it's fair).