#Dublin #Military #Ireland #SierraLeone William1 O’Brien GAVIN was the middle of three children born to William2 M GAVIN (c1775 – 1834), a military man, and Alicia O’BRIEN (1798 – 1869). I believe his father’s ancestry is possibly Ireland from Scotland but nothing confirmed.  Alicia was from Ireland though it seems.  It seems likely that he…