As of September 11, 2015, 6,540 records were found on USPTO.gov for related terms having to do with the term
It is likely that the exact term has been trademarked for a service or product.
However, His is a generic word that cannot be trademarked for its dictionary meaning.
Please check with a trademark attorney or consultant for information on how this domain can be used in commerce.
His is, well, all things having to do with Him.
What else can we say?
Short, generic, and to the point.