He called himself WATANABE no Tsuna (渡辺源次綱; '源次' was a common name for the legitimate child since the era of Tsuna's father) and became the founder of the Watanabe clan.
渡辺綱（わたなべ・の・つな。渡辺源次綱。「源次」は綱の父以来、嫡子の通称）と称し、渡辺氏の祖となる。