On a marriage cert. in Bozeman Montana 10 Mar 1914, for a Evan P. and a Hazel. it mentions mother Maud Anderson, but it also says Hazel was b. in Erie Kansas. Have you check for a 1900 census?
On the census it just says Peter Bennett. And they are in Utah.
Hazel is not a Swedish name.
In a search at Folkräkningar Swedish census you get four hits for three girls named Hazel. Two of them are born in the USA, the third has an English mother.