Roy-10 Charles was the son of Mary-9 May/Mae "Mae" Warner and her husband 1) William "Willie" Clarence Ryder.

2 RYDER full-siblings: Persis Almedia, and Gregory/Georgey C. Ryder.
1 BATCHER half-sibling, Josephine Batcher.

Roy married Martha Elizabeth Paulsen on October 5, 1919. Martha was a sister to Marshall H. Paulsen who married Persis Almedia Ryder, Roy's sister. A double-cousinship results for their descendants.

8 RYDER children:

1. Wallace Charles Ryder (1920-1937).
2. Luther Lewis Ryder (1921-2002).
3. William Glade Ryder (3/12/1924-9/28/1995).
4. Charlene Ryder B-1926; m. Corneil "Neil" Derks.
...4 DERKS children: Debra, Nancy, Beverly and David.
5. Eloyce Ryder B-1927; m. Frank Hansen.
...2 HANSEN children: Gregory and Patricia.
TWINS with
6. Royce L. Ryder (1927-2005).
7. Chilton Ryder (1931-1996).
8. Evelyn M. Ryder (1931-1932).
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Source, children's names: Vonnie Ryder, 2013.
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Reference:

1920 Oceana Co., MI:
SELF Hilda Paulsen F 53y Denmark
SON Cleva Paulsen M 25y Michigan
Ella Paulsen F 24y Michigan
DAU Martha Rider F 25y Michigan [Ryder]
Roy Rider M 26y Michigan [Ryder]

1930 Summit, Mason, MI:
Head Roy C. Ryder M 36 Michigan
Wife Martha M. Ryder F 38 Michigan
Son Walace C. Ryder M 9 Michigan
Son Luther L. Ryder M 8 Michigan
Son William G. Ryder M 6 Michigan
Daughter Charlene E. Ryder F 4 Michigan
Son Royce L. Ryder M 2 Michigan
Daughter Eloyse M. Ryder F 2 Michigan

1940 Riverton Twp., Mason, MI:
Head Roy Ryder M 46 Michigan
Wife Martha Ryder F 48 Michigan
Son Luther Ryder M 18 Michigan
Son William Ryder M 16 Michigan
Daughter Charlene Ryder F 14 Michigan
Daughter Eloyce Ryder F 12 Michigan
Son Royce Ryder M. 12 Michigan
Son Chilten Ryder M 6 Michigan

Name: Roy C. Ryder
Event Type: Draft Registration
Registration Year Range: 1917-1918
Event Place: Oceana County, Michigan
Gender: Male
Birth Date: 10 Jun 1893
Birthplace: Sherman, Michigan, United States
Nationality: United States
Affiliate Publication Title:
World War I Selective Service System
Draft Register.

Roy Ryder
Age (Expanded): 26 years
Birth Year: 1893
Birthplace: Mich.
Spouse's Name: Martha Paulsen
Spouse's Race (Original):
Spouse's Age (Expanded): 28 years
Spouse's Birth Year: 1891
Spouse's Birthplace: Mich.
Event Date: 05 Dec 1919
Event Place: Hart, Oceana, Michigan
Father's Name: Wm. Ryder
Mother's Name: May Warner [Mary M. Warner]
Spouse's Father's Name: Lewis Paulsen
Spouse's Mother's Name: Hilda Summers
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WARNER Lineage: Roy-10 C. Ryder, Mary-9 May/Mae (Warner) Ryder and Batcher, George-8 Leure Warner, George-7 Velorus Warner, David-6 Calvin Warner Jr., David-5 Calvin Warner Sr., Jesse-4 Warner Sr., Samuel-3 Warner Sr., Daniel-2 Warner Sr., Andrew-1 WARNER, an Englishman who sailed with his wife and several children to the Massachusetts Bay Colony in 1632-33 from Broad Oak, Essex, England.
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Census search: Fraya Weiss, 2013.
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Research: Mary E. Warner, 2013, 2014.