from
Who's Who -- The Definitive Directory of the DC Universe Vol. VIII (October 1985):


When she was first introduced (back in Wonder Woman #300, cover-dated February 1983), Hippolyta "Lyta" Trevor was the daughter of the Golden Age Wonder Woman and the Golden Age Steve Trevor of Earth-2.



She would then go on to take the name Fury and become one of the founding members of Infinity Inc.

But then came Crisis on Infinite Earths, which resulted in the loss of Earth-2 and all the other alternate Earths in the Multiverse. When the various Earths were merged into a single Earth, DC decided to eliminate some characters that were duplicates on other Earths, including Golden Age Wonder Woman and Golden Age Steve Trevor. However, they didn't eliminate their daughter Lyta Trevor.


from
Who's Who Update '87 Vol. 2 (September 1987)

Instead, Lyta became the birth-daughter of a newly created "Golden Age" Fury (Helena Kosmatos) and was adopted and raised by a family with the last name "Trevor". Further revisions turned that adoptive family into the Golden Age Miss America (Joan Dale) who married a man named Admiral Derek Trevor.