Davidus Ival Magister
Davidus was a man of good intentions but questionable means. Having been born on Terra during the Plague Years and having come of age under the Victorani junta, in which his half-sister Tryphena played an integral part, Davidus was a hard, taciturn man. He was not cold or cruel, like his daughter-in-law Olethea could rightly be claimed to be, he merely learned, as Euler would millennia later, not to speak, as, "I have come from a country where people are hanged if they talk." Indeed, it was probably this as well as his youth that saved him, particularly after the somewhat suspicious death of his father Nicephorus six months into the Minor Diaspora, shortly after deaths of Gurgintius Alder's other main political enemies, the pastores Iphigenia Noval and Heliodorus de Curia, seemingly of the Plague.
Somewhat unusually for an Ival, Davidus was a mathematician, the majority having been physicists and engineer by specialty. His advancements in astrodynamics lead to improved navigation in the Pallantis-class lintres that would be produced in Atlantis from 8287 - 8263 BCE, noticeably faster and more reliable than earlier models. His work in fluid dynamics, in conjunction with his half-sister Tryphena, lead to the production of the small shuttlecraft known as "puddle jumpers" and eventually allowed Atlantis to be lowered beneath the Lantean Ocean with minimal energy expenditure. His particular specialty was magnetohydrodynamics, though which he studied, quantified, labeled - and named - a large percentage of the stars in Pegasus.