"Blend of Kendall and Lynn"
The name Kendalyn is commonly a female name from the "American" origin.
Kendalyn is a modern American formation, most plausibly the English given name Kendall combined with the -lyn suffix that appears in many American girls' names of the twentieth century, such as Adalynn and Raelynn. The first United States birth record for it dates from 1964. Kendall itself comes from a place name, Kendal in Cumbria, England.
The pronunciation of Kendalyn is KEN-duh-lin.