Roy

Roy is from the Old Norman & later Anglo-Norman way of saying "King". A regal title that also became a surname and was brought to England by the Normans. People often confuse the name with it being Scottish in origin, which it is not. The Scottish word Ruadh, would later be "anglicized" to Roy. That means to make English in form or character.

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They still in the UK parliament say "Le Roy" (The King), if Royal Assent is given and a king sits on the throne. See acts of parliament like "La Reyne le veult" or "Le Roy le veult". A tradition dating back to the Anglo-Norman rule of England.

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To add to this, Rob Roy was born Raibeart Ruadh MacGriogair. His family name is not Roy, Ruadh was anglicized to Roy and they call him by his first and middle name. Thus, not Scottish in origin but rather an adoption of the Norman (later English) word Roy.

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It is seen in many variations such as: Leroy (Le Roy), Fitzroy, Glenroy, Elroy.

Can be a nickname for Ryan (sometimes I call my brother Roy-Roy as a nickname for Ryan -- it's pretty cute :)

I guess it might also mean "king" in French, since I can remember reading a book which says that King Louis XIV, if my memory serves me right, is called "le roi soleil" which means "the sun king".

It means "king" in Old French (today: "roi").