Hi I found this on ancestry I was able to verify ship that they arrived on and some marriage information I put on profile but other information has to be researched. Both Martin and John George Heilman is listed on the Loyal Judith as stated below. The findagrave found is no longer on findagrave or has been moved. Hope this helps.
John George Heilman
1720–1767
Immigrant
Unverified
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1720
(AGE)
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Birth
1720 • Nordheim, Württemberg, Germany
1 source
1732
12
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Emigration
23 Sep 1732 • Pennsylvania, USA
Left Rotterdam on the ship "Loyal Judith" with his brother Marthin.
1732
12
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Naturalization
25 Sep 1732 • Philadelphia, Philadelphia, Pennsylvania, USA
He took the Oath of Allegiance
1749
29
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Marriage
24 MAR 1749 • Zion (Moselem) Church, Richmond Twp, Berks Co, PA
10 children
Anna Christina Margaretha Kern
(1731–1774)
1767
47
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Death
5 Apr 1767 • Monroe County, Indiana, USA
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Burial
Old Dutch Cemetery--Ellettsville, Monroe County, Indiana, USA
aka: Figg Cemetery