I have some information on two children of this couple.
Nola L. Tindel (1896 TX-) married Marion Martin Callan (1888 TX-1945 TX). I believe this couple divorced. Callan is buried in Pioneer Rest Cemetery in Menard, TX. The couple had one son, Marion Hayden Callan (1915-1984)who is buried beside his father.
Gusta Ethel Tindel (1887 TX-1952 TX) married William Joseph Callan (1882 TX-1952 TX). William J. is buried in Pioneer Rest Cemetery, however Gusta is not.