The term "Pekka" primarily stands for a Finnish male given name, which is a diminutive of the name Peter. The name Peter, originating from the Greek "Petros," means "rock" or "stone." Pekka as a name is popular in Finland and several other countries. However, in the context of the game Clash of Clans, "PEKKA" is an acronym with various fan-made meanings. One of the popular interpretations from a Facebook contest held by Supercell is "Perfect Enraged Knight Killer of Assassins." Other playful expansions exist, but no official meaning for the acronym PEKKA was confirmed by Supercell. In summary:

• Pekka is a Finnish version of the name Peter, meaning "rock."
• In Clash of Clans, PEKKA stands for various fan interpretations, notably "Perfect Enraged Knight Killer of Assassins," but this is unofficial.

This covers the key meanings of Pekka based on its linguistic origin and pop culture usage.