Pekka is a Finnish male given name. It was most popular around the middle of the 20th century. As of 2013 there were more than 100,000 people registered with this name in Finland. The nameday is the 29th of June in the Finnish tradition and the 25th of June on the orthodox calendar. It originated as a variation of the name Peter (Pietari). Notable people with this name include: Pekka-Eric Auvinen (1989-2007), perpetrator of the Jokela school shooting in 2007. Pekka Haavisto (born 1958), Finnish politician and minister. Pekka Harttila (born 1941), Finnish diplomat and a lawyer.
https://en.wikipedia.org/wiki/Pekka