Jenny Everywhere's father
Jenny Everywhere's father was a mysterious figure, even moreso than Jenny's original mother. Jenny Everywhere: Secret Origins, a comic book which Jenny herself said was only partially accurate, depicted him as "the Professor".
Biography
Accounts of Jenny's "original" father
The comic Jenny Everywhere: Secret Origins claimed that he was a scientist with brown hair and a graying beard. The Professor lived on "the oldest and most advanced Earth" in the multiverse and married a red-haired woman who held a high military rank. Shortly after the birth of their daughter Jenny, the Professor spent months studying the reason the stars in the planet's sky had been going out. He discovered that a malevolent, destructive force from another universe was destroying the universe.
After he failed to get his warning across to the government, and still according to the comic, the Professor and his wife worked on creating the Pod, a machine which could allow one person — Jenny — to survive the end of the universe. Placing her in the Pod at the eleventh hour, the Professor gave the girl his goggles, to protect her from the flash of light which would accompany the machine's activation. He and his wife were then presumably killed alongside the rest of the planet when the destructive being arrived. (COMIC: The Secret Origin of Jenny Everywhere) One version of Jenny got a glimpse of what sounded like this version of her origin while suffering from shifter hangover, commenting on how similar it was to Superman's origin. (PROSE: Morning After)
However, Jenny Everywhere later visited her mother's now-empty kitchen for the first time in "centuries", showing that this account was unreliable and Jenny's childhood homeworld was not in fact permanently destroyed. This account also showed that Jenny had an older sister. (PROSE: Memories of Nowhere)
Across the Multiverse
Amelia Midnight and the Princess Katerina
In a number of continua, Jenny's origins were variations of a single familiar story. In these universes, Jenny was the (sometimes adopted) daughter of Captain Amelia Midnight, a famous inter-dimensional adventurer in her own right, captain of the hypership Zephyrus. Having a number of enemies, Captain Midnight would then hide Jenny away on the interdimensional isle of Barbelo, to be raised by Princess Katerina Corwin, the Captain's primary love interest. Although usually a woman, there were some universes where Captain Midnight was instead Jenny's father. In the Collapsed Cosmos, this origin seemed dominant for the “collapsed” Jenny, who recognised a version of Amelia Midnight who had retired at the End of Time (and who was an amalgamation of all of Amelia's selves) as her mother. (PROSE: The Hermetic Garbage of Jenny Everywhere)
Mr Bainbridge
In one universe, Jenny's father was a British man called Mr Bainbridge, who shared her liking for toast. He held vaguely chauvinistic, curmudgeonly opinions, casually using a slur to refer to the Japanese, but was the friendlier and more easygoing of Jenny's parents in contrast to her success-obsessed mother who wanted to cut out all whimsy and distractions from Jenny's life in favour of focusing on her getting good grades in school. Mr Bainbridge was a football enthusiast and often liked to talk football with his daughter or take her out to games; he thought of nothing of taking a girl to see the games, but nevertheless held that it was “a man's game” when it came to actually playing it. (PROSE: The Genesis of Jenny Everywhere)
Mr Everton
In the 38167th Universe, Jenny Everywhere and Jenny Nowhere's adopted father was a Mr Everton, married to Molly Everton née Stropcliffe. His mother, the girls' paternal grandmother, was named Clytemnestra Everton. (PROSE: Family Business)
Behind the scenes
Because "Jenny Everywhere's father," on the face of it, is an extremely vague concept defined by his relationship to an open source character, the broad idea of "Jenny Everywhere's father" can be considered an open-source character, although the visualisation and characterisation of him in COMIC: The Secret Origin of Jenny Everywhere is not open-source.
The character seen in Secret Origins is not the same person as Simon Jacobs, who was the adopted) father of a different Jenny Everywhere.
