Complex sentence: The eldest son is Tadashi Nishikawa (西川忠志, にしかわただし), the second is Hiroshi Nishikawa (西川傑志, にしかわひろし) and Kanoko Nishikawa (西川かの子, にしかわかのこ) is her daughter.
Split into simpler sentences: The eldest son is Tadashi Nishikawa (西川忠志, にしかわただし), the second is Hiroshi Nishikawa (西川傑志, にしかわひろし). And Kanoko Nishikawa (西川かの子, にしかわかのこ) is her daughter.