J. T. Kennings was most likely born in the early 26th century, shortly after the First Glimpse.
As an adolescent, he proved the existence of kenons (also called chronotons), authoring the The Laws of Time and other classics. Shortly thereafter, Kennings developed the operating principles behind the Kennings Time Displacement Engine, thus leading to the First Ender Proposition and the Last War. He is recognized as the greatest chess master who ever lived, famously defeating Vladimir Karmakov in a controversial match in which Kennings refrained from looking at the board. Kennings is also a noted culinary expert, greatly influencing the popularization of Napoleon pastries.
It has been reported that during the Paradox of the Fifth Kind at locus 14.543.9184.108.40.2065, he told a humorous story to an associate before disappearing in the explosive energy anomaly associated with the paradox.