Parents are presumed from the following facts:

1840 census the children and parents fit exactly into age brackets
except for (1) William who is listed as 60-70 when should be per 1850
census 70-80 and (2) Charlotte and Charles who were listed as 15-20
and not 10-15, but there is only a one year difference. This is
easily explained by the possibility that the 1840 census was taken
after their birthday and the 1850 census before. Valentine, who
would have been 16, is presumed to be the male listed as 15-20.

This William Martin is the only William Martin in Schoharie County
with a male household member the correct age. Of the other Martins
in the area (+- 3 pages on census), William is the only one with a
male household member 15-20.

In 1850, Valentine is not listed, as he is in Gilboa with his wife
Fedelia. In 1855, Eve Martin, found in 1850 with William, Charlotte,
Charles and Lucinda, lives next door to Valentine and Fedelia in
Gilboa with Charles and Charlotte.

We know that Charlotte and Charles are the daughter and son of Eve
per the 1855 census.

From this, I conclude that this William is Valentine's father. It
could be that he is his grandfather, but I lean toward father.
However, it is probably William's second marriage.

Valentine is thought to be perhaps named after Valentine Effner who
married the daughter Elizabeth of William (not this one) the
immigrant. Valentine Effner is reported to have been an officer in
the War of 1812 and a member of Congress. (per
www.rootsweb.com/~nyschoha/martin.html)

See also the following Martins and family (list in Martin file):

Frederick Martin shoemaker Lawyersville
Freegift P. Shoemaker North Blenheim
3 Peter Martins 2 Schoharie, 1 Gallupville
Wm. A. North Blenheim