In 1620 Tadataka married Kiku, the daughter of 長谷川求馬 who was Toyotomi-Ronin, as his second wife and before long two boys, namely Tadatsune NAGAOKA and Tadaharu NAGAOKA were born.
忠隆は、1620年（元和(日本)5年）に豊臣浪人長谷川求馬の娘喜久を継室に迎えており、程なく二人の男子（長岡忠恒、長岡忠春）を得た。