Help finish this sibling set

blond1230

Baby boy is on the way, siblings are Shane and Emma. Last name ends with -er.

A couple we semi like are Luke and Jack, but worry Luke doesn’t go with sibset and Is Jack more of a nickname?

Please help me with ideas! Can’t use Jake, Benjamin, Ryan, Eli, James,  William, Henry.

meggyme

I think that Lucas / Luke goes with your current children's names. It's probably pretty popular right now, but I think it fits.

Adding Rhett, Theodore/Theo, and John/Jonathon nn Jack

saham07

Kellen

leighry

Love Jack. Adding Isaac.

mb0112

I second pp suggestions 

John nn Jack
Lucas nn Luke
Theodore

add

Thomas
Noah
Frederick

daffodil_shoe

I love Jack.

Adding:
Noah
Logan
Max
Joshua
Owen

catmommac

I don’t think Jack is exclusively a nickname; it can stand on its own. Luke can also stand on its own. 

FakeFinn

I prefer John nn Jack with the sibset.

Suggestions:
Callum
Pierce
Milo

coastalmomma2

Agree that Jack is fine as a "stand alone" name. 

bellebaby221

I have a Jack and get tons of compliments on his name. Solid, strong and stands out with all the Jacksons around his age. 
Luke is also a great name.