Kollyns is a modern respelling of the surname Collins, which is either English, "son of Colin", a medieval pet form of Nicholas, or Irish, from Ó Coileáin, "young hound". The K and y spelling places it among the invented surname names for girls, such as Kinsley and Kollins, that peaked in the 2010s. Kollyns had fewer than five births in 2000, climbed from number 5581 in 2015 to number 1034 in 2023 and entered the top 1000 for the first time in 2025 at number 905.