Erik m. Either Proto-Norse *aiwa 'eternal' or Proto-Norse *ainaz 'one' + Proto-Germanic *rīkijaz 'ruler'.
The name of two legendary kings of Sweden, a semi-legendary 9th C king of Sweden, two 9th C kings of Sweden, two 10th C kings of Norway and Northumbria, two 12th C kings of Denmark, a 12th C king of Sweden, two 13th C kings of Denmark, a 13th C king of Norway, two 13th C kings of Sweden, a 13th-14th C king of Denmark, a 14th C king of Sweden, a 14th-15th C king of Norway, Denmark, and Sweden, and a 16th C king of Sweden.