alt.talk.royalty - join
Discussion of royalty and nobility.
Low activity, 711 subscribers, Usenet

soc.genealogy.medieval - join
Genealogy in the period from roughly AD500 to AD1600.
Low activity, 669 subscribers, Usenet

Peerage News - join
To discuss the peerage, baronetage and landed gentry of the United Kingdom; the genealogy of titled families; including news of births, marriages and deaths.
Low activity, 225 members, restricted