In September 1589 he was chosen to accompany Anne of Denmark when she sailed to Scotland to join her husband James VI, with the Admiral Peder Munk, Paul Knibbe, and Niels Krag.
[2] After returning to Copenhagen and Kronborg, Breide Rantzau came to Scotland in May 1590, as one of the ambassadors with Peder Munk and Steen Brahe accompanying James VI and Anna of Denmark.
[3] He had some family connection with Sophia Kaas (or Koss), who was staying with his wife when she was called to be a lady in waiting to Anna of Denmark.
[5] After the coronation of Anna of Denmark, the town of Edinburgh held a banquet for the Danish ambassadors on 23 May 1590 with musicians and a guard of honour armed with polearms.
In addition to Rantzausholm, he owned a number of estates, including Mogenstrup in Scania and Hellerup on Funen, which he bought in 1599 from Eiler Brockenhuus.