Refer to post:Obit for William N. Petticrew of Tioga Co. PA, died 3 Oct 1976.
For William and Harold's parents and siblings:
1900 census:Farmington, Tioga, Pennsylvania William Pettigrew 26, b. Mar 1874,married in 1898. May Pettigrew 23, b. Jan 1877. Harold Pettigrew 1, b. Nov 1898 Baby Pettigrew 2 months, b Apr 1900
1910:Farmington, Tioga, Pennsylvania William Pettigrew 38 Mae Pettigrew 33 Harold Pettigrew 11 Cecil Pettigrew 10 (a girl) Margarette Pettigrew 7 Elizabeth Pettigrew 2
1920:Farmington, Tioga, Pennsylvania William Petticrew 47, b. PA.Father/mother b. Scotland. May Petticrew 43 Harald Petticrew 21 Florence Petticrew 20 Margarett Petticrew 17 Elizabeth Petticrew 12 William Petticrew 8
(Looks like Harold was married to Florence by 1920 and they were living with his folks.)
1930 census:Framington Twp., Tioga Co. PA Pettigrew, William R.57, farmer, not a veteran, b. PA.Father & mother b. Scotland. --- May E., 53, b. PA.Father & mother b. PA. --- Wm Jr., 19, son, b. PA. Motter, Annetta M., 4 1/2, grandaughter, b. PA.Father & mother b. PA.
>>> Below is possibly the previous generation, grandparents of William and Harold and their family.If so, when and where the children were born gives a clue that the family emigrated about 1870-73:
1880 census:Framington Twp., Tioga Co. PA Richard Pettigrew 44 b. Scotland.Farmer. Mary Pettigrew 36ditto Maggie Pettigrew 15do Catharine Pettigrew 12do Charles Pettigrew 10do William Pettigrew 7b. PA Elizabeth Pettigrew 5do Gibson Pettigrew 1do
Below might be another sister, Mary:
1880:Tioga, Tioga, Pennsylvania Thomas R. Warren 45 Catherine L. Warren 40 Clara Warren 17 Ray Warren 12 Mary Petticrew 17b. Scotland.Servant.
Father Richard was dead by 1900:
1900 census:Framington Twp., Tioga Co. PA Mary Pettigrew 62, b Aug 1837.Widowed, mother of 9 children, 8 living. Lizzie Pettigrew 25, b. May 1875 Gibson Pettigrew 21b. Jan 1879
I hope this gives you material for further research.