WATANABE no Hisashi, who was a WATANABE no Tsuna's son (or grandson), became shokan (administrator) of Uno no mikuriya (a manor of Imperial family and powerful shrines) in Matsuura district in Hizen Province, and took the name of Hisashi MATSUURA; Matsuura clan, who was the jito (manager and lord of manor) in Matsuura district, became a leading clan of the Matsuura naval faction in Hizen Province.
渡辺綱の子あるいは孫の渡辺久は肥前国松浦郡の宇野御厨の荘官となり松浦久と名のり、松浦郡の地頭の松浦氏は、肥前国の水軍松浦党の棟梁氏族となる。