In June 1937, while still a toddler, Julia went sailing with her parents on the Ionian Sea but fell overboard due to a sudden storm. She was rescued from drowning by the goddess Thetis. Thetis would rescue mortal female children she deemed "special" and safely transport them to the shores of Themyscira's Island of Healing. (Male children were taken someplace else.) Once on the island the Amazon's chief physician Epione would discover them and tend to their care. After this the child would be taken to the royal palace where one Amazon is selected as the child's "Guardian of Inspiraton". The silver haired Amazon Pythia volunteered to bless baby Julia, granting her great wisdom and strength of spirit. According to Pythia, Julia was the last of hundreds of babies to experience this. This "blessing" in actuality was a subliminal suggestion for the child to teach peace and equality throughout their lives. This blessing can extend to descendants as well. This custom is called "Send Forth". Once this is done the child is considered an Amazon and spiritual daughter to the Amazon who blessed them. After a few days of recouperation and blessings the child is taken to the island shores again where she is taken back into the ocean and returned, again by Thetis who magically travels back in time to return the child to the exact point in time when the child first left her homeland. Because of this, Julia's parents believed baby Julia had disappeared under the stormy waters for only a few seconds before being pulled back into the boat.[2]

As with countless other female babies blessed by the Amazons before her, Julia thrived in her newfound spiritual blessing, excelling at every task she undertook. Despite her accomplishments Julia lost her brother, Peter Deneiros, during the war in 1944 as part of the Greek Underground when she was still very young.[1]

Later, Julia met David Kapatelis while attending Athens University. Julia was studying for her Geology Major while David was studying for his Archaeology Major, which Julia took on as her Minor study subject herself. They traveled the world together exploring various cultures and histories. At each site they would visit Julia would write down her findings and have them published in various academic journals. Eventually Julia married David in Greece.[3] An independent thinker, Julia wanted to keep her maiden name as her family had no one else to carry it on. This upset David's traditional Greek family so she relented and took David's family name of Kapatelis.

Julia became pregnant while she and David were exploring Scotland. As a joke David wanted to name their unborn child "Nessie" after the local Scotish creature the Loch Ness Monster. Though humored, Julia didn't agree but settled on Vanessa as a close substitute. Julia remained married to David until his death 22 years into their marriage when Vanessa was 5 years old. He died while exploring ruins in Egypt. Deciding to make a fresh start Julia took Vanessa to live in the U.S. where she eventually became the Dean for the Department of History and Geology at Harvard University.[2] They currently live in the Beacon Hill section of Boston, Massachusetts.

During her time at Harvard Julia also met Wonder Woman. Julia was the first non-Amazon woman Diana aka Wonder Woman ever met. At that time Diana was non-familiar with the English language and only spoke her native Themyscirian language. As it was a close derivative of Greek, Julia was able to understand Diana to an extent. Julia took Diana into her home and family and taught her not only English but modern history as well.