I have no other information on this family at this time.  The records for families of this age are based on the writing of Snorri or Adam Bede which may be more mythical than historical.  Firm birth and death dates are unreliable.  .

General Notes from Wikitree.com: Gorm's wife was Tyra - of that there is no doubt. But her parentage is even more mysterious that Gorm's.

There seems to be more evidence to support the tradition that Gorm's wife was English.

In the first place, Tyra was a Christian. It is far more likely that a Christian princess would have come from England, where the royal family were Christians, than from Jutland, which was still thoroughly pagan despite the early missionary efforts of Ansgar.

Whatever her ancestry, Gorm's Christian wife seems to have been a kindly woman, and very popular with her subjects. But she was unable to convert her husband to Christianity, and he remained a staunch pagan until his dying day.

Thyra married Gorm "The Old" Haraldsson King Of DENMARK son of Harald "Parcus" King Of Sjaelland DENMARK and Elfgifu Princess Of WESSEX, about 897 in Denmark. Gorm was born about 880 in Sjaelland Island, Denmark and died in 936 in Jellinge Vejle, Denmark 2918,3201 about age 56. Other names for Gorm were Gorm De Gamel, Gorm "The Old" Den GAMLE King Of Denmark, and Gorm "The Old" HARALDSSON King Of Denmark.

Thyra next married Geva KNUDSSON, son of Hardecanute (Knud) Sigurdsson King Of DENMARK and Elgiva, about 897 in Denmark. Geva was born before 850 in Denmark and died in 936 in Jellinge, Vejle, Denmark. Another name for Geva was Gorm Hardaknutsson.

King of Denmark, founder of the Jelling Dynasty. Made his mains set at Jelling, home of the two biggest burial mounds in Denmark and by two runic stones, one erected by Gorm and the other by his son Harold the Bluetooth. The latter stone reads, "Harald, the king, ordered this memorial made for his father Gorm and his mother, Thyra, the Harald who won all of Denmark, and also Norway, and (made) the Danes Christians." [An Outline History of Denmark]

Gorm married Thyra, the daughter of one of the regional chiefs, probably from southern Jutland. Claims that Thyra was a daughter of King Harald Klak have been discounted due to the impossibility of the ages of the persons involved.

"Danebod" was a name given her for her initiative in building fortifications around the boundaries of her region.

The Chronicon Roskildense records that "[Swen] huius filii Gorm et Hartha Knut" invaded Denmark, killed "rege Danorum Haldano cum filiis eius" and divided the kingdom between them.