Meaning and name origin
Katelyn \k(a)-tel-yn, kat(e)-lyn\ as a girl's name is pronounced KAYT-len. It is of English origin. Alternate form of Caitlin, an Irish form of Katherine. Kateline is a medieval English form. See also Kaitlin.
Katelyn is a very popular first name for females (#882 out of 4276, Top 21%) but an uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is the baby name popularity of the name Katelyn for girls. Katelyn reached its highest rank of #52 in the U.S. in 2001 (Source: 2014 Birth Name Statistics).
Displayed below is a comparison of the popularity of the girl name Katelyn and its variant forms. Popular variation forms ranked in the Top 1000/100 are Katherine (#83), Katelyn (#172), Caitlin (#496), Katelynn (#567), Katlynn, Katlyn, Katlin, Kaitlin and Katelin. (Source: 2014 Birth Name Statistics).
Katelyn is also pronounced similarly to Catelan, Catelyn, Catelynn, Katalin, Katelan, Katelijn, Katelynne and Katilyn. Other suggested similar baby names are Kaelyn▼, Kaitlyn, Karelyn, Kathleyn, Kathlin, Kathlyn▼, Kathlyne, Kathlynn, Katlyne and Kayelyn. These names tend to be less commonly used than Katelyn.