Loy is an uncommon given name of American origin, derived from the Welsh surname "Lloyd," which means "gray" or "grey." It has been used as a boy's name in America since the 19th century but remains relatively rare today. The name Loy has no associated name day and does not have any widely recognized personality traits associated with those who bear it.
"Over the course of these years (1895-1974), the name Loy had a peak popularity with 29 births recorded in 1940. However, it was relatively uncommon overall, with fewer than 10 births in most years."