I found a document of the marriage of C.W. Farwerck and J. Borrius in 1920. It contains a nice collection of family authographs.
Top left has to be the groom, Carl Wilhelm Farwerck.
Next is the bride, Johanna Borrius.
The next has to be F.O.H.R. Farwerck
Then come the parents of the bride, Borrius and Van Kempen
To the right we obviously see the autograph of Franz Eduard Farwerck, as a best man.
The other best man was Cornelis Hellingman.