Michael O'Brien

From Memory Alpha, the free Star Trek reference

Michael O'Brien was the father of Miles O'Brien.

When his wife was pregnant, Michael would give her massages to lighten her mood. (DS9: "Looking for par'Mach in All the Wrong Places")

Michael was initially disappointed with his son's decision to apply to Starfleet, having hoped that his son would become a cello player. However, after finding out how much Miles had accomplished, Michael eventually became proud of his son. (DS9: "Shadowplay")

Michael's first wife died in 2368, and he remarried the following year. (DS9: "Whispers")

By 2372, Michael and his new wife were residing in Dublin. (DS9: "Homefront")

In 2375, O'Brien told Benjamin Sisko he was visiting his father, although he was actually going to New Sydney to investigate Morica Bilby's disappearance. Julian Bashir claimed that O'Brien had only implied that. (DS9: "Prodigal Daughter")