Hi John; My surnames from Canada are LaVoie and Longdaue. After they settled in the good old USA they wanted to Americanize their names so Lavoie became LaVoy and Longdaue became Longdo. Also sometimes people weren't very well educates and spelled their names how they sounded. Other times if a name was given to someone elso to write they in their haste spelled it any which way. Deanna LaVoy-Lewis