Originally a French surname, the Gray name was first used in Scotland by a John de Grey during the reign of Alexander III in the 13th century. The name would also soon appear on the Ragman Roll in 1296 – a document in which the Scottish nobility and gentry subscribed allegiance to King Edward I of England as his army advanced north into the country in order to keep their lands. However, like many others, the family would also go on to swear allegiance to Robert the Bruce in his fight against the English during the subsequent Scottish War of Independence. As a reward, Sir Andrew Grey (the clan chief0 would be granted lands in Perthshire at Longforgen by Bruce.
Today, the present Lord Gray is barred from holding the clan chiefship thanks to a court decision in 1950 by the Lord Lyon which prohibits anyone with a double-barrelled name from assuming chiefship.