there is something eerie about this grouping, all inside a supposed generation.
D. Splane cited Frederick Franz, (who never generated,) as the quintessential under lapper. FF once gave a talk: "The Children God has given me" he must have anticipated that these would continue to spin his tales along all the way to 2075, as the OP stated > 80 years beyond FF's demise. RIP 1992 overlapped to 2075,
an 83 years extension with a 20 year overlap, perhaps by an anointed "sister" more than 100 year old, --doable.