Kelli

Meaning & origin

Kelli is a respelled variant of Kelly that first appeared in U.S. birth records in 1945, at a time when the original spelling was already popular for girls. The name reached its peak rank in 1970, aligning with the broader trend for Gaelic surnames as first names. Since 1986, however, its usage has steadily fallen, and by 2025 it stood at rank 6,546 with only about 1 in 94,545 girls receiving the name. The spelling Kelli, with an '-i' ending, was part of a mid-century fashion for feminizing names through vowel substitutions, similar to variations like Christi or Kari. Although the name never cracked the top 1,000 overall across the decades, its 1970s peak reflects the era's affinity for friendly, two-syllable names ending in 'ee'. Kelli remains a recognizable if less common choice, maintaining a connection to its Irish heritage through the original surname Kelly.

Kelli is a variant spelling of Kelly, an Anglicized form of the Irish surname Ó Ceallaigh, meaning 'descendant of Ceallach'. The personal name Ceallach is of uncertain meaning but is often interpreted as 'bright-headed' or 'strife'. The surname Ó Ceallaigh was borne by a prominent medieval Irish clan, and Kelly became common as a given name in the English-speaking world in the 20th century, first for boys and later predominantly for girls. The variant spelling Kelli emerged in the mid-20th century, particularly in the United States, reflecting a trend toward creative respellings.