Jakob was the son of Sigismund von Thun and Anna Ursula von Caldes. The date and place of his birth have not been found.
He had two marriages/partners. His first wife was Katharina von Schlandsberg. They were married, but the date and place have not been found. Their two known children were Ursula (c1465-c1527) and Anton Maria (c1450-1522).
His second wife was Antonia de Caballis. They were married, but the date and place have not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | herr zu Castell Brughier |