Hi, you have a reply from another volunteer. I'll consolidate the information here and add findings for Grace.
Paul Raymond LaBrant was born about 1883, died 1958 married Ida Batschelet born about 1881, died 1933 buried Fairview Cemetery, Stanley, Mountrail County, North Dakota
1910 US Census Stanley Ward 1, Mountrail, North Dakota Paul Lacbrant27 Ida Labrant 29 b abt 1881 Iowa father b Switzerland, mother b Missouri Grace Lacbrant 4 months old
1920 in Stanley, Ancestry.com indexed the family as La Braut
1930 Stanley, Mountrail, North Dakota Paul R La Brant 47 Ida M La Brant b abt 1881 Iowa father b Switzerland mother b Missouri Grace H La Brant 20 Adah M La Brant 19
Adah Margaret Labrant born 01 March 1911 married Clarence Les Lattin in 1935, died 19 June 2008, last residence Fair Oaks, Sacramento, California
Grace in 1940: 1940 US Census Sundance, Crook, Wyoming Irwin Reiste 32 born about 1908 North Dakota Grace Reiste 30 born about 1910 in North Dakota
Seems to be Grace's son: Obituary, La Crosse Tribune [Wisconsin] 11 December 2011 David John Reiste, 70, of La Crosse, passed away peacefully in his home on Friday, Dec. 09, 2011. He was born Oct. 23, 1941 to Grace (LaBrant) Reiste and Irwin John Reiste in Bellfouce, S.D.He grew up in Wyoming and Montana. David graduated from high school in Great Falls, Mont., and graduated from M.I.T. He married S---- M. Schmuck on Aug. 3, 1968, and together they had one daughter, L--- ...."
No siblings mentioned. I omitted the living people, above. See the online obituary for more information.