Her son Tagishimimi would attempt to seize power violently due to not inheriting the throne.
Note that the -hime (媛) on the end is the word for "princess", and that tsu (津) appears in Old Japanese as the genitive particle, which was sometimes omitted from names.
Meanwhile, according to the Genealogical Catalogue of the Ancient powerful families(古代豪族系図集覧) by Tositaka Kondo(近藤敏喬), her older brother is Amasori(天曽利), ancestor of Ata no Wobashi no kimi.
[1] As such, some have pointed to a connection between this person and the Hayato people that also appear in the Nihon Shoki as descendants of Hosuseri.
[2] According to Nihon Shoki, Emperor Jimmu (then a prince) took Princess Ohiraizu as his consort while he was in Hyūga before he made the Eastern Expedition.