• Edwin O'Loughlin (Ireland) / Katherine Lutz
  • Edward W. O'Loughlin / Margaret
    • Edwin F. O'Loughlin / Mildred
      • Edward W. O'Loughlin / Diana
        • Michael O'Loughlin
        • Jeffrey O'Loughlin
    • Louis O'Loughlin / Kitty
      • Marty O'Loughlin
      • Christene O'Loughlin
    • Catherine O'Loughlin / Norm Mitchell
      • Estille Mitchell
      • Shirley Mitchell
        • 1 son (name unknown)
    • Betty O'Loughlin / Don Burke
      • John Burke / Joy
        • 2 children (names unknown)
      • Steve Burke / Julie
        • 2 children (names unknown)
      • Paul Burke / Tracy
        • 1 daughter (name unkown)
    • Edna O'Loughlin / Harold Raab
      • Harold Raab
      • Edward Raab / Nancy
        • 2 sons, 1 daughter (names unkown)
      • Lois Raab / Don Erb
        • 1 sons, 1 daughter (names unkown)
      • Linda Raab / Joe Fleischman
        • 1 son, 1 daughter (names unkown)
  • William O'Loughlin / Matilda
  • Annie O'Loughlin / ?
  • Margarett O'Loughlin / Harry Peter Barrett (Baltimore)
    • Lewis Barett (Baltimore; d. as infant)
    • Harry Edward Barrett (Baltimore) / Gladys Lousinbelle
      • George Barrett (served in the US Navy)
      • Robert Barrett (served in the US Marine Corps)
      • William Barrett (served in the US Army)
      • Children from previous marriages:
        Harry Edward Barrett (Baltimore) / Kathleen (Kitty) Worthington Collins
        • Jane Barrett
        • Harry Richard (Dick) Barrett
    • Russell Leo Barrett Sr. (Baltimore) / Clara Olszewski (b. June 17, 1909, Baltimore)
      • Russell Leo Barrett Jr. (b. Nov. 3, 1930, Baltimore) / Eleanor (El) Louise Arnold (b. 1943; Baltimore)
        • Children from previous marriages:
          Eleanor L. Arnold / Robert C. de Socio
          • Michael Robert de Socio (Baltimore)
          • Mark James de Socio (Baltimore)
          Russel Leo Barrett Jr. (b. Nov. 3, 1930, Baltimore) / Anne McCracken
          • Cindy Barrett (b. 1952, Baltimore)
      • Richard Barrett (b. Nov. 3, 1930, Baltimore) / Joyce
        • Susan Barrett (Baltimore)
        • Celina Barrett (Baltimore) / Charles Ettinger
          • Brent Ettinger (Baltimore)
          • Craig Ettinger (Baltimore)
        • Jill Barrett (Baltimore)
          • Brandon Barrett (Baltimore)
        • Children from previous marriage:
          Richard Barrett (b. Nov. 3, 1990, Baltimore) / Francis
          • Caroline Barrett
      • Betty Barrett (Baltimore) / Bill Grauling (Baltimore)
        • Joyce Grauling (Baltimore) / Michael Carnes
        • Carolyn Grauling (Baltimore) / Richard Gibbons
        • Terri Grauling
        • Bill Grauling Jr. (Baltimore)
        • David Grauling (Baltimore)
      • Rodney Barrett Sr. (Baltimore) / Nancy
        • Kristin Barrett (Baltimore)
        • Children from previous marriage:
          Rodney Barrett Sr. / Barbara
          • Kim Barrett (Baltimore)
          • Rodney Barrett Jr. (Baltimore)
      • Ronald Barrett (Baltimore)

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