Explanations

Each of the seven volumes of Baen Books' The Technic Civilization Saga opens with an Introduction by the Compiler of the Saga, Hank Davis. 

After the first story collected in Volume I, The Van Rijn Method, readers find what purports to be an INTRODUCTION to the second story, "Wings of Victory." However, this passage is an Introduction not just to this single story but to the entire The Earth Book Of Stormgate whose twelve instalments are distributed in their appropriate chronological places from near the beginning of Volume I until the mid-point of Volume III, Rise Of The Terran Empire. 

The fictional author of the Earth Book Introduction introduces himself as "Hloch of the Stormgate Choth," refers to himself in the third person and informs the "people" whom he addresses that:

"His Wyvan Tariat son of Lythran and Blawsa, has asked this."

-Poul Anderson, The Van Rijn Method (Riverdale, NY, 2009), p. 75.

This can mean nothing to readers at this stage, especially if this volume is their first encounter with Poul Anderson's Technic History. Hloch means that a "Wyvan," whose name is Tariat, has asked Hloch both to compile and to introduce the Earth Book. The title or rank of "Wyvan" does not recur until the third instalment in Volume III and is not explained properly until the sixth and last instalment in that volume.

However, in that last instalment, The People Of The Wind, Christopher Holm/Arinnian flies to Lythran's aerie where, after a communal meal in the dining hall, Arinnian's Ythrian friend, Eyath:

"...asked permission to leave of her father Lythran and her mother Blawsa..."

-Poul Anderson, The People Of The Wind (Riverdale, NY, 2011), pp. 437-662 AT I, p. 443.

This contextualizes Tariat. He is the son of a head of a household and the brother of Eyath although neither he nor Hloch appear in The People Of The Wind. (At least, I do not think that Tariat appears but will check.)

Even after centuries in the Weathermother on Avalon, members of the Stormgate Choth remain mostly hunters, not herders. Although Ythrians have become an interstellar power, they remain not omnivores but carnivores who must herd or even still hunt. Their biology affects their psychology, sociology and theology.