Coal or dark-haired
A modern spelling variant of the English surname Colby, which originated from Old Norse elements meaning 'Koli's settlement' or 'dark settlement.' It is often associated with the color of coal or a person with dark features.
Less common today
Kolbi isn't in the latest US Top 1000. It last peaked at #3,612 in 2025.
American college softball player
US births per 5-year period, 1990–present (SSA data).
