https://paperspast.natlib.govt.nz/newspapers/NZH18870321.2.45
The above URL links to an article at Paper's Past, it confirms that he had three daughters, and names two of them.
The eldest daughter was Hariata Tarahau (married Owen Davis) not named, but implied as the other two are referred to as 2nd daughter and youngest daughter. 2nd daughter was Hira (married Mita Hape) and the 3rd daughter was Maraea (married Hori Te Ngahuru).
According to Hare Hongi Stowell, there was a son named Kowhai, who in turn had a son named Tuauru.
This profile could really do with some sourcing, else you just end up with children being included that may not belong there.
I also note people confuse Hare Hongi I (who died at Kaipara 1825) with his younger full brother Hare Hongi II (who lived a long time, but eventually died in 1885).
Hope this helps.