It's common knowledge and it seems I've always known the main
character's name in A Connecticut Yankee is Hank Morgan.  I, however,
have been unable to find that name occurring anywhere in the on-line
editions I have of this book - Gutenberg Project.  I've been doing
string searches on the text versions I have but the only Morgan it finds
is Morgan le Fay.  I Know it's his name but I don't recall how I know
this, but Wikipedia tells me it's so.