Look at the timeline it could go like this.
1 Ritcher, Juste ( Father of Ritcher, and grandson of Simon) Simon ( Great grandfather of Ritcher, grandfather of Juste)
2 Ritcher, Juste Grandfather of Ritcher, and grandson of Simon *Great Great grandfather of Ritcher, and grandfather of Juste)
since there's a short gap between Juste and Ritcher giving how close their timelines are. Juste could appear in the new series as an old man.