Depends in which type of connection you mean.

If you mean that they are the same Garland, which was magically send through space-time from a game to another, I don't think so. =x
One was a knight, the other was a being created to preserve his planet's life.

If you mean a relation more like... "Random guy from square: I'm lazy. Let's re-use names from our old games so we don't have to research for other cool looking mythological names" Then yes.

Honestly, besides the names I don't think there is any relation.