No he isn't Spanish, he thinks it looks wrong spelt Reuben as until we were looking at names he had only ever seen it written Ruben.
I am the opposite and have only ever known it spelt Reuben and after the responses on here it seems to suggest that most people would write Reuben if asked.
He will not be budged though and as I can't bear the thought of our son going through life constantly having to correct the spelling for everyone I fear we will not be having it as our name, which is a real shame as it's one of the few that I like!