- Peter Peck (b. 1872 London, England) / Carrie Benjamin
- Robert Faust Peck (b. 1919, Baltimore; d. Oct. 26, 2006, Marblehead, Massachussetts) / Josephine Rollinson (Marblehead)
- Julia Fitz-Randolph (Marblehead) / Bourge Hathaway (Marblehead)
- Robert Peck Jr. / Brenda Beaton (Marblehead)
- Vanessa Van Dell Peck (Cambridge, MA)
- Jonathan Van Dell Peck (South Beach, Florida)
- Benjamin Peck (Marblehead)
- Chris Peck (Marblehead)
- Robert Faust Peck III (Marblehead)
- Francis William (Billy) Peck (Baltimore)
- Henry Bolton Peck (Baltimore) /
- Henry Peck Jr. (Baltimore)
- Carolyn Elizabeth Peck (b. January 21, 1913, Baltimore; d. 1985) / Giorgio (George) Pasquale de Socio (b. October 30, 1911, Rome; d. 1985)
- Robert Cosden de Socio (b. 1941; Baltimore) / Eleanor (El) Arnold (b. 1943; Baltimore)
- Michael de Socio (Baltimore)
- Mark de Socio (Baltimore)
- George Mackey de Socio (Baltimore)
- Linda de Socio (Fairfax) / Jon Bock
- Ivan Bock (Fairfax)
- Robyn de Socio (Fairfax) / Jeff Wright
- Carolyn Inez Wright (Richmond)
- Giorgio de Socio (Raleigh)
- Thomas de Socio (Baltimore) / Lucia Schuon
- Stepanie de Socio (Fairfax)
- Anna de Socio (Fairfax)
- Carolyn de Socio (Fairfax)