Courtesy lookup, I'm not related! Their father, William Albion Crowder (25 Oct 1850 - 23 Nov 1942) was older brother of your Isaac Martin Crowder. That's per online death certificate viewable/printable https://familysearch.org/
Their mom: Mary Elizabeth Crowder (4 Apr 1860 - 8 Feb 1940). Claude Crowder (20 Aug 1884 - 30 Jan 1948) never married and died in Pampa, Gray County. Frank Leslie Crowder (4 May 1880 - 21 Aug 1952) died in Los Angeles, CA. He married twice and appeared to have only one surviving offspring, Mary Lee born ca 1907? Since "Tidwell" is part of your subject line you probably are aware she wed Dewey D. Tidwell?