I like
Simon,
Isaac, and truthfully I don't really like any of your girl names but the best are
Shira,
Adara, and
Liora (but in real life
Liora reminds me of my cousin and
Shira reminds me of a third cousin :/).
Miriam reminds me of my favorite aunt so I think it makes a perfect name!
Combos:
Talia Miriam,
Simon Barak,
Isaac Doron?
New Suggestion:
Eliana?
My fave combo from yours are
Simon Elijah and
Miriam Shira, but I'm not crazy about them because I don't like
Elijah, but if you do I'll accept it, as it flows.
Miriam sounds a bit too old for a baby (sure we'd use a nickname Miri/Mira/Mimi but still...).
So let's make a deal...
Simon Elijah for a boy and
Talia Miriam for a girl. That way we'll both have one combo on the table that we love.