Scandinavian form of Christina, from Latin 'Christianus' meaning follower of Christ.
Kristin is the Scandinavian form of Christine and Christina, names rooted in the Latin Christianus — meaning "follower of Christ" or "anointed one" — which in turn derives from the Greek Christos. It arrived in Norway and Sweden through the medieval Church and took on a distinctly Nordic character, shedding the Latin softness of Christine for something crisper and more grounded in the consonant-heavy soundscape of Norse languages. The variant spelling, with a K rather than C, became the definitive Scandinavian form.
The name's greatest literary moment came in the twentieth century with Sigrid Undset's monumental trilogy Kristin Lavransdatter (1920–1922), set in fourteenth-century Norway. Undset's Kristin — passionate, devout, and deeply conflicted — is one of the most fully realized female protagonists in world literature. The trilogy won Undset the Nobel Prize in Literature in 1928, and it permanently elevated the name in Scandinavian cultural consciousness, binding it to themes of love, sacrifice, faith, and the fierce interior life of women in a world that constrained them.
Kristin traveled to English-speaking countries in significant numbers during the mid-twentieth century, carried by Scandinavian immigrants and by a broader cultural appetite for the name's clean, unfussy sound. It peaked in the United States in the 1970s and 1980s, borne by athletes, actresses, and politicians. Today Kristin sits in that interesting zone of a name that has had its fashionable moment but retains a kind of solid, unfashionable dignity — associated more with competence and character than with trend.