Luther Lee was the son of Rev. Myron J. Pollok (B-5/22/1835 in Sodus, Wayne, NY) and his wife Nancy A. Decker B~1836-37.

4 POLLOK full-siblings found:

Ada E. (Pollok/Pollock) Squires (1857-1920).
Arthur Benjamin "Ben" Pollok (1861-1928).
[Self] Luther Lee Pollok (1865-1929).
John M. Pollok (1867-1930).
Jason Delbert Pollok (1870-1952).
Cecil Everette (Pollok) Pollock (1879-1964).
Catherine Kate Ann (Pollok) Putnam (1859-1922); moved to Iowa and later CA.

1 POLLOK half-sibling:

Mildred I. (Pollok) Phelps (1887-1938).
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Luther married Lillian Howe B-4//3/1875 in Alaiedon, Ingham, MI. Lillian died on 11/4/1960.

Obituary states 9 children, but 4 died prior to Luther's death.

13 POLLOK children:

1. Myron James Pollok (4/26/1895-4/1977) born in Vevay, Ingham, MI, died in Grand Rapids, MI; m. Crystal Roberts.
...5 POLLOK children:
...Theresa, Zola, Chrystal, Luther Lee, and Howard.

2. Grace Pollok (10/8/1898-11/2/1917); never married.

3. Ruth Beatrice Pollok (11/10/1899-10/7/1973); never married.

4. Everett Cecil Pollok (3/7/1901-1/19/1984) died in Lansing, Ingham, MI; m. Arletta Roberts.
...1 POLLOK child known:
...1. Marion E. Pollok B-1944.

5. Nancy Pollok B-1902.

6. Roy A. Pollok (11/13/1903-3/20/1904); infant death.

7. Leon Oliver Pollok (12/4/1904-1930).

8. Vance Pollok (11/14/1907-9/13/1988); m. Leah Jean Diehl (12/15/1912-7/5/1999) on 1/18/1945.
...1 POLLOK child:
...1. Roger Vance Pollok; m. Nancy Beck.
......2 POLLOK children:
......1. Scott Allen Pollok; m. 1) Charla Brittin, m. 2) Deanna Lynn Coleman.
.........1 POLLOK child: Stefani Leigh Pollok.
......2. Bruce David Pollok.

9. Marion Harold Pollok (9/14/1910-6/21/1983); m. Bonnie Kittridge D-1979. Marion was staying with his sister, Mary E. Bebow when he passed away in Arizona.

10. Carroll L. Pollok [male] (12/26/1913-11/11/1990) died in Florida; m. Grace Kruse.
...2 POLLOK children:
...1. Kenneth Pollok; m. Sharon Dixon.
......2 POLLOK children: Shane and Kristopher.
...2. Nancy Pollok; m. Steve Scott.
......2 SCOTT children: Stephanie and Adrienne.
Military WWII Enlistment records for Carroll, 5/15/1941 Kalamazoo, Kalamazoo, MI.

11. Harold Luther Pollok B-1914.

12. Robert William Pollok (1/27/1916-7/21/2000); m. Irma Ione Warner (6/28/1916-9/16/1992)
...3 POLLOK children:
...1. Keith William Pollok B-194X; m. Ann Louise Haring
......3 POLLOK children: Robert Harding, Randall William, Gregory John.
...2. Irene Lillian Pollok B-19XX; m. Gary Raymond Vittoz.
......2 VITTOZ children: Christopher A. and Nicole Marie Vittoz.
...3. Linda Laverne Pollok B-19XX; m. Henry Brinker. Divorced.
......4 BRINKER children: Sarah Jean, James John, Andrew, and Benjamin.

13. Mary Eileen Pollok (8/3/1918-10/20/2001); m. Robert William Bebow. Mary died in Phoenix, Arizona.
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Reference (notice the spelling of "Pollok"):

1870 Michigan:
Myron J. Pollok M 35 New York
Nancy A. Pollok F 33 New York
Ada E. Pollok F 12 Michigan
Cathrine Pollok F 10 Michigan
Benjamine Pollok M 8 MI [Arthur Benjamin]
--Luther L. Pollok M 5 Michigan
John Pollok M 2 Michigan
William Patterson M 22 Michigan

1880 Wheatfield Twp., Ingham, MI:
Self Myron J. Pollok M 45 New York
Daughter Kate Pollok F 20 Michigan
Son Benjamin Pollok M 18 Michigan
Son Luther Lee Pollok M 15 Michigan
Son John Pollok M 12 Michigan
Son Cecil Pollok M 1 Michigan
Son Jason Pollok M 10 Michigan
Wife Nancy Pollok F 43 New York

1900 Wheatfield Twp., Ingham, MI:
Head Luther L Pollok M 35 Michigan
Wife Lillian Pollok F 24 Michigan
Son Myron J Pollok M 5 Michigan
Daughter Grace Pollok F 4 Michigan
Daughter Ruth B Pollok F 1 Michigan
Brother-in-law Llewellyn Howe M 30 Michigan

1910 Putman, Livingston, MI:
self Luther Pollock M 45y Michigan
wife Lillian Pollock F 35y Michigan
son Myron Pollock M 15y Michigan
dau Grace Pollock F 13y Michigan
dau Ruth Pollock F 10y Michigan
son Everett Pollock M 9y Michigan
son Leon Pollock M 4y Michigan
son Vance Pollock M 2y Michigan

1920 Ingham Co., MI:
self Luther Lee Pollock M 54y Michigan
wife Lillian Pollock F 44y Michigan
son Myron J. Pollock M 24y Michigan
dau Ruth Beatrice Pollock F 20y Michigan
son Everett Cecil Pollock M 18y Michigan
son Leon Oliver Pollock M 14y Michigan
son Vance W. Pollock M 12y Michigan
son Marion Harold Pollock M 9y Michigan
son Harold Luther Pollock M 6y Michigan
son Robert William Pollock M 3y11m Michigan
dau Mary Eilene Pollock F 1y4m Michigan

1930 Wheatfield Twp., Ingham, MI:
head Lillian Pollock F 55 Michigan
son Leon O. Pollock M 24 Michigan
daughter Ruth R. Pollock F 30 Michigan
son Vance L. Pollock M 22 Michigan
son Marion H. Pollock M 19 Michigan
son Caroll L. Pollock M 16 MI [Carroll]
son Robert W. Pollock M 14 Michigan
daughter Mary E. Pollock F 11 Michigan

1940 Wheatfield Twp., Ingham, MI:
head Lilliam Pollok F 65 MI [Lillian]
daughter Ruth B. Pollok F 40 MI
son Vance W. Pollok M 32 MI
son Marion H. Pollok M 29 MI
son Robert W. Pollok M 24 MI
son Caroll L. Pollok M 26 MI [Carroll]
daughter Mary E. Pollok F 21 MI

Name: Luther L. Pollock
Event Type: Death
Event Date: 24 Oct 1929
Event Place: Ingham, Ingham, Mi
Gender: Male
Age: 65
Marital Status: Married
Birth Date: 25 Jan 1864
Birthplace: Michigan
Birth Year: 1864
Father's Name: Myron J. Pollock
Mother's Name: Nancy Decker
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NOTE: Most online Family Trees list 12 children, but Harold Luther is listed in the 1920 Census report, for a total of 13 children.
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NOTE: The spelling of the Pollok surname may also show up as Pollock in other online genealogies; the headstones and Census reports will solve the question.
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Census search: Fraya Weiss, 2012, 2013, 2014.
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Research: Mary E. Warner, 2012, 2013.
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Additional information from DeeAnn Scott, 2012, 2013.