NN Brings Plenty - Brings Plenty as a middle and last or as a two word surname for Native American

I found several FaG memorials for Plenty and I found Brought as a middle name with Plenty as a surname.
Looking to complete family groups
https://www.findagrave.com/memorial/195169325/cyril-b-brought_plenty
Cyril B. Brought Plenty
BIRTH
12 Aug 1931
North Dakota, USA
DEATH
20 Mar 1978 (aged 46)
Fort Yates, Sioux County, North Dakota, USA
BURIAL
Saint Peters Catholic Church Cemetery
Fort Yates, Sioux County, North Dakota, USA

Parents

August Brought Plenty
1900–1956

Lulu Agnes End Of Horn Brought Plenty
1899–1934