He became friends with Alaric Jacob, and despite their political differences, O'Brien would refer to Jacob as his oldest friend.
Jacob | John Jacob Astor | Jacob M. Appel | Jacob Epstein | Jacob Zuma | Jacob Obrecht | Jacob Lawrence | Jacob Appel | John Jacob Astor IV | Irène Jacob | Jacob Jordaens | Alaric | Paul Jacob | Meshullam ben Jacob | Jacob Riis | Jacob Grimm | Jacob Christian Schäffer | Jacob Appelbaum | Jacob Truedson Demitz | Jacob ter Veldhuis | Jacob's Ladder | Jacob's biscuits | Jacob's Award | Jacob Rothschild | Jacob L. Devers | Jacob Latimore | Jacob Kirkegaard | Jacob Kielland | Jacob J. Shubert | Jacob Hackenburg Griffiths-Randolph |