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A few things found that may indicate this string of posts should relate to Yorkshire North.
1. I too located the death of Tamar PRUDOM in 1865, that being in Yorkshire North
2. Brother Mark is actually a half brother to John, I have discovered.  After a brief stint in Canada with John, he was in the 1841, 1861 and 1871 English Census as Mark PRUDOM the later two in Bransdale which I believe is in North Yorkshire.  Have also tracked a gravestone which I believe is his.  Buried in St Nicholas, Bransdale as Mark PRUDHOM. Still no parentage for the three. 
Tamar was older and was close to John after the death of their mother when he was about 4.  Father remarried and had Mark.

As a variation on the subject, how about unfortunate initials.
I won't use his full last name because I'm sure he is still around, but back in High School there was a fellow names Vern Davi...........
We called him "disease".   Maybe one should say unfortunate friends.

Thanks The Mc and Trish1120
The Mc  -  Just after I made the post I realized there were three Yorkshire areas, so not sure I am even in the right "Yorkshire". 
That being said, I have seen the picture (your link) before and often visit the site as the area is a hotbed of my mother's side of the family
The child Charles in the picture is my maternal Grandfather and raised his family there.  I have stayed at the home myself as a boy.  It should be pointed out that the house still stands and was not demolished in 2005 as noted in the picture caption. 
Trish1120  -  You are right that the children's names can present a clue.  There is a Hannah amongst the children.  Also from a Family Reunion booklet of 1928 John's birth year is listed as 1809, not the 1807 as I have above, but his death record seems to support 1807 (died age 82).
Thanks again to you both.   

Does anyone have any informaion on John Prudham (1807 Yorkshire - 1889 Kilbride, Ontario, Canada.  He married Elizabeth Foster of Ireland, in Ontario 1839.
More specifically his parentage, etc.
Would like to uncover this.
Thanks.   

Mmmmmmmm ....... I can't agree.
At least I don't see them as the same person.
Thomas has curly hair and unknown rellie's is straight.
Not sure where unknown rellie is supposed to be from, but Thomas is born, raised and died in Ontario, Canada.