Ukko is a Finnish male first name derived from the name of the ancient Finnish deity mentioned in the Kalevala, Ukko. Ukko’s name day is celebrated on the 4th of April. According to the data from the Digital and Population Data Services Agency, the name Ukko was given to 2,469 individuals from the early 1900s until the end of 2019, with the majority born after the turn of the millennium.

Ukko-Pekka was a commonly used nickname for President Pehr Evind Svinhufvud. By the end of 2019, the name Ukko-Pekka had been given to around 100 Finnish individuals as their first name.