About Athra / Annar
Hathra was the son of Hwala.1
During Hadra's rule a great flood from the ocean came over the land, despoiling the grass and silting the land. This great flood drove much of the surplus population south to Rome, where they were killed or enslaved. As a result of that flood, the people knew that the gods were displeased, so rule passed to Itermon Hadring.
Lóriði is the son of Thor and Sif and forefather of Norse rulers, according to the prologue of the Prose Edda. Loridi does not appear in any other instance of Norse mythology.
One should note that the author of the Prose Edda Snorri Sturluson was a christian and he used the prologue to explain how the norse pagans came to believe what they did. The prologue allowed Snorri the framework to assert that he was a christian before going on to relate the potentially heretical pagan tales of the norse gods in the Gylfaginning. Snorri posits the theory that many of the heroes from ancient city of Troy came to Scandanavia and were revered as gods and demigods.
For these reasons Lóriði should not be considered the son of the mythical Thor. Lóriði is not an actual part of the ancient norse myths.
-Near the earth's centre was made that goodliest of homes and haunts that ever have been, which is called Troy, even that which we call Turkland. This abode was much more gloriously made than others, and fashioned with more skill of craftsmanship in manifold wise, both in luxury and in the wealth which was there in abundance. There were twelve kingdoms and one High King, and many sovereignties belonged to each kingdom; in the stronghold were twelve chieftains. These chieftains were in every manly part greatly above other men that have ever been in the world. One king among them was called Múnón or Mennón; and he was wedded to the daughter of the High King Priam, her who was called Tróán; they had a child named Trór, whom we call Thor. He was fostered in Thrace by a certain war-duke called Lóríkus; but when he was ten winters old he took unto him the weapons of his father. He was as goodly to look upon, when he came among other men, as the ivory that is inlaid in oak; his hair was fairer than gold. When he was twelve winters old he had his full measure of strength; then he lifted clear of the earth ten bear-skins all at one time; and then he slew Duke Lóríkus, his foster-father, and with him his wife Lórá, or Glórá, and took into his own hands the realm of Thrace, which we call Thrúdheim. Then he went forth far and wide over the lands, and sought out every quarter of the earth, overcoming alone all berserks and giants, and one dragon, greatest of all dragons, and many beasts. In the northern half of his kingdom he found the prophetess that is called Síbil, whom we call Sif, and wedded her. The lineage of Sif I cannot tell; she was fairest of all women, and her hair was like gold. Their son was Lóridi, who resembled his father; his son was Einridi, his son Vingethor, his son Vingener, his son Móda, his son Magi, his son Seskef, his son Bedvig, his son Athra (whom we call Annarr), his son Ítermann, his son Heremód, his son Skjaldun (whom we call Skjöld), his son Bjáf (whom we call Bjárr), his son Ját, his son Gudólfr, his son Finn, his son Fríallaf (whom we call Fridleifr); his son was he who is named Vóden, whom we call Odin: he was a man far-famed for wisdom and every accomplishment. His wife was Frígídá, whom we call Frigg.