A genealogy of the Heath, Palmer, Thayer, Goodnow, and other allied families.
| Name | John_I | |
| Title | Count of Holland | |
| Gender | Male | |
| Person ID | I1591 | royal |
| Last Modified | 18 Apr 2025 | |
| Family | Elizabeth, b. Aug 1282, Rhuddlan Castle  d. 5 May 1316 (Age 33 years) | |
| Marriage | 18 Jan 1297 | Ipswich |
| Family ID | F609 | Group Sheet | Family Chart |
| Last Modified | 18 Apr 2025 | |
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