Federal and Indian Affairs census records have recorded the story of Yellow Wolf's family on the Colville Reservation.
 In 1910, the U.S. Federal Census asked Yellow Wolf to tell about his family, and he said he had married twice (the second for 17 years by that date) and had 9 children (of whom only two were living at that date).
By the time of his death in 1935, he told McWhorter that only one of his children was alive, his son Billy.

He was married to a Nez Perce woman named Pe-Tol-Von-nan-Ick, who was known in English as Helen.
They were listed together in the 1890, 1892 and 1893 censuses, and she was gone by the 1905 census.
It is not recorded whether she died or they left each other.
 They had a son, Te-Yoh-Yoh-Shin (Billy Yellow Wolf) who was born in 1888.
A woman, Chick-A-Moh-Peo (Jean), listed as mother lived with them, in her 80s.

Yellow Wolf had another wife by 1905, I-O-To-ton-My (Little Mountain Woman), and they had a son together who would have been born in 1901.
She was eight years younger than Yellow Wolf.
They lived with the two sons in the 1906, 1906 and 1910 censuses.
The census lists a 1-year-old daughter in 1905, Epu-tepkoset who did not live until 1906.

His son Billy lived with the family off-and-on over the years.
He was widowed at age of 21, with a son, and married at least two more times by 1916.
Billy's child did not survive; neither did his next son.
Federal and Indian Affairs census records have recorded the story of Yellow Wolf's family on the Colville Reservation.  In 1910, the U.S. Federal Census asked Yellow Wolf to tell about his family, and he said he had married twice (the second for 17 years by that date) and had 9 children (of whom only two were living at that date). By the time of his death in 1935, he told McWhorter that only one of his children was alive, his son Billy.
He was married to a Nez Perce woman named Pe-Tol-Von-nan-Ick, who was known in English as Helen. They were listed together in the 1890, 1892 and 1893 censuses, and she was gone by the 1905 census. It is not recorded whether she died or they left each other.  They had a son, Te-Yoh-Yoh-Shin (Billy Yellow Wolf) who was born in 1888. A woman, Chick-A-Moh-Peo (Jean), listed as mother lived with them, in her 80s.
Yellow Wolf had another wife by 1905, I-O-To-ton-My (Little Mountain Woman), and they had a son together who would have been born in 1901. She was eight years younger than Yellow Wolf. They lived with the two sons in the 1906, 1906 and 1910 censuses. The census lists a 1-year-old daughter in 1905, Epu-tepkoset who did not live until 1906.
His son Billy lived with the family off-and-on over the years. He was widowed at age of 21, with a son, and married at least two more times by 1916. Billy's child did not survive; neither did his next son.
Yellow Wolf (Nez Perce)