Komobuchi 【薦渕】2 The Japanese surnames etymology dictionary.
① Convention . Abbreviation of Sawaura. Kanagawa-ken Ashigarakami-gun Yamakita -machi When Kawamura Castle that was in Yamakita falls, Mr. Sawaura disguises it as a camouflage and remodeled "Sawa". Estimated in the Azuchi Momoyama period. It was in Shizuoka-ken Hamamatsu-shi during the Edo period. 沢浦 reference.