Norse
Thor
thunder, protection of gods and people, strength
Japanese (Shinto) tradition. See the whole pantheon.

Born from Izanagi's nose. Banished from heaven, he kills the eight-headed serpent Yamata no Orochi to rescue Kushinada-hime, and finds the sword Kusanagi in its tail.
All sources for the Japanese (Shinto) pantheon
Lineage in the sources used: Izanagi.
Deities in other traditions who share a theme with Susanoo: sky, storm and thunder, trickery, boundaries and travel, sea and waters. This is overlap in one area only.