Would his mother have been married once before? Did Samuel have any children? If so, his first child could have been named after his father.
In the 1900 census in Madison Co. MO, Samuel and his brother are listed with a William M Wilson and Nacy A. his wife. They are listed as stepsons. Here is a copy of census.
Name: Henry C Marsh
Titles and Terms:
Event Type: Census
Event Date: 1900
Event Place: ED 70 Twelve Mile Township, Madison, Missouri, United States
Birth Date: Jul 1876
Birthplace: Missouri
Relationship to Head of Household: Stepson
Father's Birthplace: New York
Mother's Birthplace: Missouri
Race: White
Gender: Male
Marital Status: Single
Years Married:
Marriage Year (Estimated):
Mother of how many children:
Number of Living Children:
Immigration Year:
Page: 10
Sheet Letter: A
Family Number: 173
Reference ID: 9
GS Film number: 1240873
Digital Folder Number: 004118801
Image Number: 00496
Household Gender Age Birthplace
Head William M Wilson M 66 Missouri
Wife Nancy A Wilson F 48 Missouri
Stepson Charles S Marsh M 26 Missouri
Stepson Henry C Marsh M 24 Missouri
Citing this Record:
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M3Z2-FNW : accessed 24 Oct 2013), Henry C Marsh in household of William M Wilson, ED 70 Twelve Mile Township, Madison, Missouri, United States; citing sheet 10A, family 173, NARA microfilm publication T623, FHL microfilm 1240873.