Etymology and distribution of イルマス.

Irumasu* 【イルマス】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hyougo-ken , Hiroshima-ken , Shimane-ken .

① Hyougo-ken Kanzaki-gun Ichikawa-chou Origin of Uruiobi and Uchihao . A place name with a record since the Kamakura period.

② Shimane-ken Un'nan-shi Originated from the vicinity of Shinjo Daito Town (formerly Ushio-soo). Place name with a record in the notation of "Ocean Tide" in the Nara era.

③ Chiba-ken Katori-gun Tako-machi Origin of Ushio (Ushio). A place name with a record since the Kamakura period.