Wouldn't it be funny if Grampa's name actually WAS Werner, but because of the way it was pronounced the "family" just "assumed" the spelling was with a "V" vice the real "W" that it should be?

Something to consider. On my birth cert, my middle name is spelled with a "u" in it but whoever wrote it made it look like an "a"... so as a kid, I was confused as to what letter it actually was. I used the "a" when I joined the military so all my military docs have the "a" when in fact my actual name is a spelled with a "u". Doesn't much matter as I know who I am