I am trying to verify I have the right person..   My grandfather William Peter Olson came from Sweden & lived in Colorado from 1885 to 1936.  He was a stone mason and worked for the railroad I have a death certif in 1936 that shows his father as Ol Martinson mother unknown Census & other records show him born from 1851 to 1855. I found a Peter Wilhelm Olofsson born in Habol Alvsborg 22 Jan 1853 to OlOF Martensson and Britta Marie Magnusdotter. in Familysearch.org. I believe this to be my grandfather. There is a difference however, the 1900 census shows him born in February of  1853 He had 4 other siblings brothers and parents were married in 1844 Dals Ed.  Is there a way I could find out when he emigrated to the US I believe He is in the 1880 census for Hennepin county Minnesota I found a william Olson as a border who was a stone mason.    Taks  Any help would be appreciated .      Mike Schummer