Lizzie was born within a year of 1892, the daughter of Mary and John Mike, Jr. (1905 census)
In the 1911 census, she is listed as the wife of John Blackhawk, with the Indian name of MaHeHaTaWinKah, and being of the age of 19 years, which implies a birth date of 1892.
The name MaHeHaTaWinKah is for Mąxixetewįga, from mąxi, "cloud"; xete, "big, large, old"; -wį-, a feminine gender infix; and -ga, a definite article suffix used in personal names. This is an Upper Moiety name, as is "Blackhawk," which shows that by this time the rule that all marriages are to be cross-moiety had broken down.
In the 1905 census, her birth order name is given as We Hun Kah, which is for Wīhą́gā, "Second Daughter."
The 1910 Federal census lists John and Lizzie Blackhawk as married, but married for 0 years, which means that they were married in that year of 1910.
1905 Indian census; Roll: M595_671; Line: 4. Indian Census Rolls, 1885-1940; (National Archives Microfilm Publication M595, 692 rolls); Records of the Bureau of Indian Affairs, Record Group 75; National Archives, Washington, D.C.