This colourful character, Georg Rahlff (1762-1833), http://www.geni.com/people/Georg-J%C3%B8rgen-Rahlff/6000000005025858398 , Dr. medicus and Knight of Dannebrog, writes in his own memoires that he is son of proprietar and judge Georg Rahlff and Margrethe Mackeprang, both of which died of pox when little Georg was 4 years old, in 1766 according to himself, but how that father was connected to the rest of the Rahlff family eluded me for a long time.
The clue was right under my nose, however: In reading in his Rahlffske legat he said in 1821 that his brotherson is Captain Frederik Rahlff, premier lieutenant. This clearly makes him the brother of Joachim Rahlff.
Note that the parents of the miller, Joachim Rahlff, that is Jürgen Rahlff and Martha Rauert ( http://www.geni.com/people/Martha-Rahlff/4591424 ) both died within the same month in June 1768. Was that when there was a pox epidemic? They turned out to be Georgs parents after all. So he had had the miller Joachim as his 7 years elder brother, although there is no direct mentioning of him in Georgs memoires.
Also, Joachims grandfather, Jürgen Rahlff ( http://www.geni.com/people/J%C3%BCrgen-Rahlff/4591481 ) died in 1773, matching the "died when Georg was 11" perfectly. And Joachim had three daughters, one of which could be the dear brotherdaughter Georg fondly mentions.
Georg died childless, but was very attached to his brother's daughter who traveled with him to Fehmarn in his elder days.
Also, Georg and Jürgen and Jørgen are simply different versions of the same name, so Georg Rahlff was called Jørgen Rahlff when studying in Copenhagen in 1787.
So now the questions are: why are these people mentioned thus:
- Martha Rauert = "Margrethe Mackeprang" ?
- And which of the three sisters - daughters of his brother- accompanied Georg on his travel?