Liam and his brother, Killian, are abandoned by their father Brennan and sold into slavery. As adults, Liam and Killian serve in their King's navy and set off to Neverland in order to recover a plant that supposedly heals miraculously. However, when they arrive at Neverland, they are confronted by Peter Pan, who tells them that the plant they are looking for is actually poisonous. Killian becomes unsure of himself, but Liam believes that Pan is lying and shows unwavering loyalty and faith to the King. In order to prove this to Killian, he cuts himself with the dreamshade, and subsequently dies on the trip back. Liam's demise is what triggers Killian into becoming a pirate, as he had lost faith in his King.
In the Underworld, Hades blackmails Liam into stealing pages from the Underworld's storybook. Although initially deceving his brother Killian, Liam does the right thing by defending his brother from Hades. Hades nearly banishes Liam to "somewhere worse", but something else intervenes and Liam moves on to a better place.
- Brennan Jones (deceased father))
- Mrs. Jones (deceased mother)
- Mrs. Jones (deceased step-mother)
- Killian Jones (brother)
- Emma Swan (sister-in-law)
- Henry Mills (stepnephew)
- Cinderella Mills (stepniece-in-law)
- Lucy Mills (step great-niece)
- Liam Jones II (half-brother)
- S3, E05: "Good Form" (flashback)
- S5, E11: "Swan Song" (flashback)
- S5, E15: "The Brothers Jones"