Glennis is a distinctive given name of Scottish origin, derived from the place name Glenelg. It means 'glen of the church'. The name gained some popularity in the mid-20th century due to its use by notable individuals like Glennis Graham, the first woman to break the sound barrier in an aircraft. Despite its historical significance and unique charm, Glennis remains relatively uncommon today.
Over the span of nearly four decades from 1912 to 1957, the name Glennis experienced significant popularity and fluctuation. The highest year for this name was 1947 with 62 births, while it fell to as low as 5 births in 1980 and 1993. Overall, there were a total of 2056 babies named Glennis during these years.