Scania, Hadding grew up among giants.
In the Danelaw of the ninth century, Skafloc grew up among elves.
On Avalon in the twenty ninth century, Tabitha Falkayn grew up among Ythrians.
On Imhotep in the thirty first century, Diana Crowfeather grew up among Tigeries.
This could be a single timeline because it is acknowledged that gods, giants, elves etc had withdrawn from Earth before the twentieth century. Here are four children in very different alien environments imagined by Poul Anderson.
Hadding is the rightful King of Denmark and an incarnation of the god, Njord. Skafloc is the son of the Dane-chief, Orm. Tabitha Falkayn is a direct descendant of David Falkayn, Founder of Avalon. Diana Crowfeather is the illegitimate daughter of Dominic Flandry. Four important people with non-human upbringings.