This page lists just about everything I know.
The Saccomando (and Cardinale) families come from the towns of Naro/Racalmuto, Sicily and Vallelunga Pratameno, Sicily respectively. The Sodaro family moved from Termini Imerese to Vallelunga around 1840.
Names on the Italian side: SACCOMANDO, CARDINALE, LAROCCA, CAVARETTA, SODARO, GRECO, CIRESI, SANFRATELLO.
The O'Brien (and Murphy) families are (of course) Irish, but it is unknown exactly when immigration took place. Family legend says around the Potato Famine of the mid-1800's.
Names on the Irish side: O'BRIEN, MURPHY, COSTELLO, PORTER, SMITH, WALLACE.
The Arrington (and Holton) families come from Jefferson County, Georgia.
Names on the Georgia side: ARRINGTON, HOLTON, ROWLAND, PENNINGTON, WILLIAMS, PORTIS, OATES, BROWN, DALRUMPLE, HUDSON, ATTAWAY, WRIGHT, WATKINS, DEBOSE.
The Sparkman (and Osborne) families come from Eastern Kentucky (around present-day Knott County).
Names on the Kentucky side: SPARKMAN, OSBORNE, SMITH, TRIPLETT, HALL, OWENS, HARRIS, YEARLY, HICKS, FUGATE, STACY, COMBS, MOORE, COLLIER.