Lorena is a lovely name. I remember the first time I read Gone With the Wind and was so excited when Scarlett's second child was named Ella Lorena. It wasn't a name (or combo, for that matter) that I'd already liked, but once I'd read it and said it several times, I found it so exciting and fresh. I became absolutely hooked on Lorena and adored Ella's character (even if Scarlett thought Ella was a little giddy-brained and rather ugly. :/). So, the name has wonderful connotations for me.
As for combos, how about:
Lorena Scarlet (maybe too themey :p)
Lorena Carson
Lorena Dove
Lorena Julie
Lorena Cornelia
Lorena Ingeborg (I love the mixing of ethnicities...Spanish and Norwegian makes a delicious combination!)
Lorena Angelyn
Lorena Rosalind
Lorena Lucasta
Lorena Lucina
Lorena Fiorella
Lorena Saskia
Lorena Christiane
Lorena Nanon
Lorena Catherine (pronounced the French way :))