Furthermore, unusual for a family ranked as the House of Urin, the Iwakura family was created a Prince House (duke) at a time when the second son of Tomomi IWAKURA, Tomosada IWAKURA (younger brother of Tomotsuna IWAKURA, the first son of Tomomi; Tomosada inherited the Iwakura family) headed the family.
さらに具視の次男(具視の長男具綱の弟、岩倉家を相続)岩倉具定の代になって羽林家としては異例の公爵に叙せられている。