Back in 1967 when I married my first wife, the rules were less strict for a KH wedding. In our wedding the best man and the bride's maid were both regular pioneers, but my wife's father was not a JW, and he gave her away. I think that in the 1980s they changed the rules for KH weddings and now require every member of the wedding party to be a JW in good standing.
They were even less strict in the 1950s as I remember JWs getting married in the KH where with the exception of the bride and groom the rest of the wedding party were all non-JW friends and relatives.