Born of a Swedish noble family, he married in 1913 baroness Ebba Fleetwood, eldest daughter of district judge, baron Carl Fleetwood, 10th baron of Jälunda, and his first wife countess Hedvig, née Lewenhaupt.
Wilhelmina "Mina" Sofia Charlotta Bonde, née Lewenhaupt (10 July 1817 - 1899), was a Swedish countess and courtier.
Caroline (Karolina Juliana Anna Ulrika) Lewenhaupt (1754, Oberbronn - 1826 Linköping), was a Swedish courtier, poet and amateur actor.
Molvig has been married twice, first to the Norwegian composer Alfred Janson and later to the Swedish count Carl Adam Lewenhaupt ("Noppe").
Officially pronounced dead, she went to Sweden, where she lived under the name Dorothea von Ziedewitz, first as the guest of Governor von Brehmen and then with his widow outside Kalmar, and finally with the Lewenhaupt family on Stäflö for a payment of §1000, where she died, aged seventy-six.
In 1703 he had to transfer a good part of his forces to reinforce Lewenhaupt's in Kurland.