Whakaotihia te rerenga e whai ake nei: I whanau a MG Cairns ki te taote o te ope taua, te koronel Douglas Walker Cairns me tana wahine, a Ethel Moore Cairns, i te Hui-tanguru 14, 1910, i Brooklyn, New York. Ko tana papa, ko LTC Cairns i haere ki te Mahi Mahi i te Pakanga Tuatahi o te Ao, ka tiimata neke atu i te 100 tau o te Ratonga Mahi Koreutu i waenga i ana uri. Ko Tākuta Cairns me Gen. John J. "Blackjack" Pershing i roto i te
Pancho Villa haerenga me muri mai i te Moutere o te Kawana, New York. Ko Bugs Cairns me tona tuakana, COL (Army Air Corps me USAF) Douglas Moore Cairns, i puta i West Point i te 1932 me te 1933. I whakaingoatia a Cairns mo nga tupuna e rua, ko te Brigadier General Robert Bogardus, nana nei i whakahaere te tiaki o New York i te Pakanga o 1812, me tana matua keke, a Colonel Robert Bogardus Snowden, ko ia te pito o te tao a Longstreet i te Pakanga o Chickamauga i te Pakanga a-Rohe. He uri ia no Kapene Robert Walker, he rangatira i roto i te American Revolution, tae atu ki a Lieutenant James Frisbie, i mate i raro i te whakahau a John Paul Jones i runga i te Bon Homme Richard i te whakaeke ki te Serapis. I heke ia mai i a Dominie Everardus Bogardus, te tohunga tuatahi o te Dutch Reformed i New Amsterdam i tae mai i te 1634, me Isaac Snowden, tetahi o nga kaitiaki o te Continental Congress me te Kaitiaki o te Taone nui o Philadelphia.