How about Sore / Soar,
Ren, Reny, Sorey, So, Soso?
Anything that is related to
Soren might work such as
Seve or
Severo.
Something from the MN might work.
I really like the name
Soren and one of the bonuses to me is that people have a harder time coming up with a nn for it.
I hope this helps!