"Variant of Kirsti"
The name Kjersti is commonly a female name from the "Gaelic" origin.
Kjersti is a Norwegian feminine name, a form of Kirsti, the Scandinavian short form of Kirsten and ultimately of Christina. The kj spelling is regular Norwegian orthography for the initial sound of the name. It is an established given name in Norway rather than a modern invention, and it begins appearing in United States birth records in 1969.
Kirsti means "A follower of Christ, Christian, Anointed; covered in oil. The short form of Kiersten".
The pronunciation of Kjersti is SHER-stee.