The question of new bookmarks always brings me to Lithuania, much like 867 and 769 had - because, as someone who lives there and fairly immersed in its history, I can tell that PDS always grasps at straws when filling the region out with rulers. 867, in the Paradox timeline, is the start of the legendary House of Palemon, while 769 has all fictional rulers (though I feel like they missed a real opportunity to fill the Baltics in 769 with Widewuto's sons - though they were from the 600s, there isn't going to be a 600s bookmark regardless, so they can safely be recycled for the 8th century).
However, since 867 is the start of the House of Palemon in CK2, and Palemon is the leader of Lithuania in TOG bookmark (even though he should be Roman and Hellenic if the legend were taken at face value), who is in control of Lithuania in the 936 start date? Palemon's three sons are characters in 867, so none of them should be alive by 936.
Kernius, perhaps? He only has a daughter Pajauta while his brother Gimbutas is in control of Samogitia - oddly similar to Charlemagne and Carloman
However, since 867 is the start of the House of Palemon in CK2, and Palemon is the leader of Lithuania in TOG bookmark (even though he should be Roman and Hellenic if the legend were taken at face value), who is in control of Lithuania in the 936 start date? Palemon's three sons are characters in 867, so none of them should be alive by 936.
Kernius, perhaps? He only has a daughter Pajauta while his brother Gimbutas is in control of Samogitia - oddly similar to Charlemagne and Carloman