In the Great Falls Tribune newspaper, Great Falls, Montana on 10 April 2011 is the obit for Laurence "Larry" Thayer - son of Byron and Rose Thayer. In his obit states he was preceded in death by his wife Donna, his parents Byron and Rose Thayer, and by his brother LeRoy "Buck" Thayer and his (LeRoy's) wife Clara Thayer. Lawrence Thayer grew up in Belt, Cascade Co., Montana.
In the book "Belt Valley History 1877-1979 on pg. 275 is the story of the Thayer family. It is the history of Henry B. and Mary Thayer. Henry (widowed) and his two sons Burton and Byron Thayer came to Montana in 1917 settling in Belt, Cascade Co., Montana. Byron Thayer married Rose Saul and they were parents of sons Laurence Thayer who md Donna Nelson, and LeRoy Thayer who married Clara Lennon.
With Clara's name listed as Lennon is would seem that she may have been previously married before she md to LeRoy Thayer. Hope this is of some help to you. Sincerely, Judith Fraser