What does Harolyn mean?
Harolyn is an unusual given name for females and an equally uncommon surname for both adults and children. (2000 U.S. Census)
Below is a graphed analysis of the usage of Harolyn and related names. Prominent alternative forms of Harolyn (#unlisted) are Carolyn (#742 in 2014), Karolyn, Carolynn and Carrie. Usage of these girl names was at its apex during the years 1940-1949 (usage of 0.6308%) and is now significantly less (usage 0.0645%, down 89.8%), with the versions Carolyn and Carrie becoming less in vogue. (Top 1000 Baby Names Statistics, 2014)
A recommended similar baby name is Darolyn. Like Harolyn, this name is not commonly used.