Her mother was Elizabeth Peke (Betty), the youngest daughter of Isaac Davis, from Milford Haven, Wales who was an important military advisor of King Kamehameha I during his conquest of the islands.
In 1824, her grandfather Kaumualiʻi, the vassal king of Kauaʻi who had been exiled by Kamehameha II and forced to marry Queen Kaʻahumanu, died in Honolulu.
Harriet's father started a rebellion on Kauaʻi, challenging the rule of King Kamehameha II and Queen Kaʻahumanu.
[1] They were treated with kindness and the Queen regent nicknamed the child ka wahine kipi ("The Rebel Woman" in the Hawaiian language), in reference to the 1824 battle, a name that stayed with her for the rest of her life.
George was captured in a few weeks and they returned his wife and child, but forced him into exile on Oʻahu.