Hook allegedly meets Captain Nemo "During the time of the Dark curse." However, it is revealed in Season 2 that Cora stopped time in a corner of the enchanted forest when she shielded them from the curse.
Hook reveals that he has a younger brother, named after his older brother, Liam. Later, when the Evil Queen enters Rumple's shop, Rumple makes a comment about "The Pirate and his son" rather than his brother.
They weren't talking about Hook and Liam they meant Hook and Henry.
They weren't talking about Hook and Liam they meant Hook and Henry.