Celine StClair nope. He said in a panel he and his brother were named after characters in LOTR but he has since said that although he was named after Samwise his birth certificate just says Sam. His brother is definitely called Cirdan though.
Just watched KDS interview." Trying to match Caitrionas sister with Sams brother." K said it would an unusual family reunion, and i say "UNLESS, unless its two brothers married to two sisters...mmmph