Unidentified duchies in the game

[Nosferatu]

I don't know why but I found some strange duchies, which are not in the game (at least I didn't found them on the map of the duchies at the FAQ section). Here I go:

1) Duchy of Tavasts (their is only a duchy of Karelia, Estonia and Finland in the territory of historical Finland),

2) Duchy of Kola (I got this when the High chief of Kola has been converted into christianity).

That is all for now. Can somebody explain how this new titles appeared in the game?

 

[Veldmaarschalk]

They are duke-titles without any provinces/counties assigned to them.

Or in CKII terms, they are titular titles.

 

[Aardvark Bellay]

I don't know why but I found some strange duchies, which are not in the game (at least I didn't found them on the map of the duchies at the FAQ section). Here I go:

1) Duchy of Tavasts (their is only a duchy of Karelia, Estonia and Finland in the territory of historical Finland),

2) Duchy of Kola (I got this when the High chief of Kola has been converted into christianity).

That is all for now. Can somebody explain how this new titles appeared in the game?

Pagans and muslims have their own titles not showing to you, as you only see the christian titles, but you can grab them (not sure about this) or get them in a peace deal. As a christian you can't create them.