Francis Henry, was the ninth and youngest son of Duke Francis II of Saxe-Lauenburg from his second marriage to Maria, daughter of Duke Julius of Brunswick and Lunenburg, Prince of Wolfenbüttel. King Henry IV of France was his godfather. In a contract of inheritance dated 1619, Francis Henry recognized his elder brother Augustus as sovereign, in exchange for an annual appanage of 2500 thaler. When King Gustav II Adolf of Sweden landed in Peenemünde in 1630, Francis Henry entered his service and earned his affection. He fought as colonel and regiment commander under general Johan Banér and was victorious in the Battle of Wittstock in 1636. Gustav Adolf gave Francis Henry the estates of the nunnery of Marienfließ Abbey in Pomerania. On 28 June 1643 Gustav Adolf's daughter, Christina of Sweden, leased Marienfließ to Francis Henry for 10 years, after which it reverted to the new ruler of Pomerania, Frederick William, the Great elector, on 12 December 1653, rewarding Francis Henry's improvements to the estate. After his mother's death in 1635, he received Franzhagen in a division of her property among her sons. When his brother Augustus died, Francis Henry received Wangelau and Rothenbeck in addition. While in Swedish service and thereafter he spent a lot of time with Sophia of Schleswig-Holstein-Sonderburg, dowager of Philip II, Duke of Pomerania. Sophia's and Francis Henry's fathers were cousins. It was at her dower in Treptow upon Rega, a former nunnery which she had converted into a castle, where Francis Henry and Marie Juliane of Nassau-Siegen married on 13 December 1637. Their first child was born in Treptow in 1640. Francis Henry also served Sophia as administrator of the estates pertaining to her dower. Francis Henry and his brother Francis Charles objected the planned succession of their brother Julius Henry as sole ruler of Saxe-Lauenburg. However, when Julius Henry succeeded their late elder half-brother Augustus, deceased in 1656, this dispute was finally resolved. Later Francis Henry resided at Franzhagen Castle. Due to his miserliness, his subjects gave him the nickname Francis Drybread.
Marriage and issue
Francis Henry married on 13 December 1637 in Treptow upon Rega with Marie Juliane, a daughter of Count John VII of Nassau-Siegen, with whom he had the following children:
