William married Jane UNKN about 1830. They had at least seven children noted below in the census records. Sons Daniel and David are buried in this cemetery.

We have reason to believe that William Swyers was the son of a William Swyers Sr. b. btw ... To be continued ..

Supporting census data:

1850 United States Federal Census
Name: William Swires [Occupation listed as "Forgeman" ]
Age: 45
Estimated Birth Year: abt 1805
Birth Place: Pennsylvania
Gender: Male
Home in 1850 Juniata, Blair, Pennsylvania
Family Number: 19
William Swires 45
Jane Swires 37
Sarah A Swires 18
Joseph Swires 16
Daniel Swires 11
David Swires 9
Susannah Swires 7
Theresa Swires 2
John Coltybaugh 40
Edmund A Swires 20
Source Citation: Year: 1850; Census Place: Juniata, Blair, Pennsylvania; Roll: M432_755; Page: 176A; Image: 355.

1860 United States Federal Census about Winfield Swyers
Name: Wm Swyers
Age in 1860: 53
Birth Year: abt 1807
Home in 1860: Boggs, Centre, Pennsylvania
Gender: Male
Post Office: Milesburg
Wm Swyers 53
Jane Swyers 49
Daniel Swyers 20
David Swyers 18
Susan Swyers 17
Teresa Swyers 11
Winfield Swyers 8
Source Citation: Year: 1860; Census Place: Boggs, Centre, Pennsylvania; Roll: M653_1090; Page: 364; Image: 90; Family History Library Film: 805090.

1880 United States Federal Census
Name: William Swiers
Home in 1880: Central City, Centre, Pennsylvania
Age: 72
Estimated Birth Year: abt 1808
Birthplace: Pennsylvania
Relation to Head of Household: Self (Head)
Spouse's Name: Jane Swiers
Father's birthplace: Pennsylvania
Mother's birthplace: Pennsylvania
Occupation: Forgeman
Marital Status: Married
Race: White
Gender: Male
William Swiers 72
Jane Swiers 70
David Swiers 35 Listed as Son
Bertha Swiers 8 Listed as Gdau
Edward Swiers 6 Listed as Gson
Source Citation: Year: 1880; Census Place: Central City, Centre, Pennsylvania; Roll: 1112; Family History Film: 1255112; Page: 105A; Enumeration District: 219; Image: 0209.