Henry Palmer Onderdonk christened on 22 Mar 1812 at Rockland, Clarkstown Twp, Reformed Dutch Church. His parents were Peter Onderdonk and Peggey Palmor. (sic)
[Griswold.FTW]
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"Michigan Land Records" shows a Henry P. Onderdonk obtaining 360 acres on 1 May 1839 at the Kalamazoo district office. Record # sndx 0536. sale cash.

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1840 census Eaton Twp- Bellvue, Eaton co,MI 1 male 20 under 30; 1 female under 5; 1 female 20 under 30
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1850 census Eaton co,Eaton Rapids Twp, Michigan

Onderdonk, Henry P. Farmer 38 NY
Sarah M. Wife 39 NY
Annetta dau 11 MI
William H. son 10 MI
Florance dau 5
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1860 census Eaton Rapids, Eaton MI--image 39 of 74
Henry P. Underdonk 48 Farmer NY
Sarah M. 48 NY
Wm H. 19 Mich
Florence 14 Mich
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1870 Eaton Rapids, Eaton, MI 49/92
Onderdonk Henry 58 Farmer NY
Sarah 59 Keeping house NY
William 30 Farmer OHIO
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1880 "Other Townships", Eaton, MI 11 of 27
Onderdonk H.B. 68 Farmer NY NY NY
Sarah 68 Keeping House NY NY NY
Onderdonk Wm 39 Farmer MI NY NY
Rosella 27 wife Keeping house MI NY NY
Nina 7 daughter MI
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1900 Michigan Eaton Hamlin Twp (heritage quest)
4/4 Onderdonk Rozilla Head w f Dec 1852 47 wd 2/2 MI NY NY
Gilman Nina dau May 1876 24 m 0 years 0/0
Onderdonk Nellie? dau Apr 1888 at school 12
Gilman Herbert son in law Dec 1877 22 m 0 years farmer
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1910 Michigan Eaton/ Hamlin Twp/ Dist 90 7 of 19
Gilman, Herbert J. Head m w 32 m1 10yrs MI MI IND Farmer General
Nina M wife f w 33 m1 10yrs 0/0 MI MI MI
Onderdonk Rozella mother in law f w 57 wd 2/2 MI NY MI
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1920 Michigan Eaton Hamlin Dist 104
Gilman Herbert head r m w 42 m farmer general farm
Nina wife 43 m
Onderdonk Rozella mother in law f w 67 wd
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1930 Michigan Eaton Hamlin Dist 18
Gilman Herbert Head 52 General Farming
Nina wife 53 m 23yrs
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Death certificate from Eaton co.Michigan stated that Henry died 19 Nov 1895 at the age of 83 years, 9 months, 18 days.
place of death was Hamlin Twp, Eaton co,MI
Cause: heart failure
Born in New York on 1 Feb 1812; Parents were Peter Onderdonk and Peggy Onderdonk. ---