This is what I have found on this family thus far. Believe that they moved to this area from the Northampton area of Pa...... early generations are speculation, but based on the information in referenced book below:
1 William Younkins. Born on 7 Jun 1822 in Westmoreland, Pennsylvania. William died in Worthington, Armstrong, Pennsylvania on 26 Jan 1902; he was 79. Buried in Worthington, Armstrong, Pennsylvania.
On 30 Sep 1848 when William was 26, he married Sarah Hawk.
2 Michael Younkins. Born in 1788 (or 4 Oct 1790), Westmoreland, Pennsylvania. Michael died in North Buffalo, Armstrong, Pennsylvania bef 8 Jun 1869; he was 81. Buried in Union Baptist Cemetery, Kittanning, PA. Will: Vol. 2 p.521; Administration #1973; Proven: 8 Jun 1869 in North Buffalo Twp., Armstrong Co., Pa. The first land purchase for a YOUNKIN was in Freeport, Armstrong Co. by Michael YOUNKIN 'of' Allegheny Twp., Westmoreland. Source: Genealogical & Personal History of Western Pa., by John W. Jordan, LL.D. Pub. 1915 Pg. 1248 & 1289:much of the family information is from this book which contained his biography. "After his marriage he settled in Tarentum, Westmoreland Co." Religion: Methodist-Episcopal tombstone says died June ?3, 1869 age 81 years
On 14 Sep 1821 when Michael was 33, he married Mary Locke.
3 Mary Locke. Born on 17 May 1799 in Grove City, Mercer, PA. Mary died in Armstrong, Pennsylvania on 24 Sep 1878; she was 79. Buried in Union Baptist, Cemetery.
4 Michael Younkins. Born in of Easton, Northampton County, PA.
Michael married Barbara Cocher.
5 Barbara Cocher.
10 Michael Cocher. Michael died abt 1808 in Quemahoning, Somerset, PA.