Funatsu 【船津】5 The Japanese surnames etymology dictionary.
Chiba-ken Minamibousou-shi , Kanagawa-ken · Toukyou-to . Ibaraki-ken Ryuugasaki-shi Origin of sand town. A place name with a record since the Edo period. In Chiba-ken , I told that I changed my name from Ebihara surname using "book" because I was from the book on the same site as sand town "sand". Estimated from tradition living from the Muromachi period. 海老原 reference.