After his death, a magnificent sandstone sarcophagus was erected for him in the church of Esens (now the St. Magnus Church) in 1473.
After the birth of John Edzard, her youngest child and only son, Walburgis needed tot recover and moved from Esens to Wittmund.
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Countess Walburgis of Rietberg (1555 or 1556, Rietberg – 26 May 1586, Esens) was 1565-1576 and 1584-1586 Countess of Rietberg.
Prince Christian Everhard of East Frisia (1 October 1665, Esens – 30 June 1708, Aurich) was a Prince of East Frisia from the House of Cirksena from the day he was born in 1665, but remained under guardianship until 1690.
Sibet Attena, a nephew and aid to Ulrich received the lordships Esens, Stedesdorf and Wittmund, which together formed the Harlingerland.
Firstly, he married Countess Walburgis of Rietberg (1556–1586), daughter and heiress of Count John II of Rietberg, Lord of Esens, Stedesdorf and Wittmund and Countess Agnes of Bentheim-Steinfurt.
Sibet Attena, a nephew and ally of Ulrich, received the lordships Esens, Stedesdorf and Wittmund, which together formed the Harlingerland.