I really like
Lucian, I think it is a great name, it's handsome and smart sounding and not a common name but not to unusual, I also really like the meaning.
Luca and
Luce are nice nicknames, I probably prefer
Luca, which is really nice for a name on its own.
I think it goes well with
Theodora.
Some middle names
Lucian Remy StewartLucian Edward StewartLucian Gabriel StewartLucian Ignatius StewartLucian Adrian StewartLucian Micah StewartLucian August StewartLucian Silas Stewart
New Names PNL:
http://www.behindthename.com/pnl/151224