Carollyn is not a popular first name for women and an equally uncommon surname or last name for both men and women. (1990 U.S. Census)
Carollyn \c(a)-roll-yn, car(ol)-lyn\ as a girl's name is a variant of Caroline (Old German), and the meaning of Carollyn is "free man". The baby name Carollyn sounds like Carolyn, Caralyn, Carlyn, Carrolyn, Carolynn, Carolin, Carolann, Karolyn, Carolyne, Carolein, Carolan, Carllen, Carilyn, Caroyln and Carolien. Other similar baby names are Caroly, Caroll, Darolyn, Harolyn and Marillyn.