Whakaotihia te rerenga e whai ake nei: I whanau a Davidson i Fairfax County, Virginia. Ko ia te tama a William B. Davidson, he rangatira pu i te ope taua o te United States, me te Elizabeth Chapman Hunter o mua. Ko ia te tuakana o nga tama tokowha; Ko ona tuakana ko Hunter, Roger, me Charles. I mate tona papa i te mate i a ia e mahi ana i Florida i te wā o te
Te Pakanga Tuarua o Seminole i te tau 1840. I mate tona whaea kotahi tekau tau i muri mai, i muri tata mai i tana marena.