Marrying close to home.

Anyone who has spent time in the parish books of San Giovanni Evangelista learns the same lesson we did while indexing them: in a town the size of Sassano, tucked in the hills 95 miles southeast of Naples, everyone eventually married a relative. Not out of scandal, but out of geography. For centuries the town's marriageable population was, quite literally, whoever lived within walking distance — and more often than not, that meant a cousin.

Using the full Sassano-Bompietro family tree — now over 31,512 individuals and 7,912 families as new records keep getting indexed — we set out to see just how common this really was, and whether it followed the Sassanesi all the way to Federal Street.

It did, and more than we expected.

Of the 6,369 marriages in the tree where both spouses' parentage could be traced, 1,444 were between blood relatives close enough to identify: first cousins, second cousins, third cousins, or fourth cousins, some with a generation's remove between them. The overall share rises to 22.67%, from 22.53% last update. Twelve cousin marriages joined the count and none left it, taking the total from 1,432 to 1,444, while the number of marriages checked rose from 6,356 to 6,369. All twelve are in families that were already in the tree. They surfaced because this update added 102 people to the tree and dropped 18 (a net gain of 84), 98 of the additions born before 1750, which carried several early lines back a generation and let existing couples be traced to a common ancestor. The ancestors behind the most new matches are Candeloro Calandriello (five marriages), Vito Orso Petrizzo (three) and Anna Maria Valvella (two). Six of the twelve are fourth cousins. Two are third cousins (Giovanni Antonio Petrizzo and Rosa Maria Villano, 10 Sep 1794, and Giovanni Agostino Villano and Bernardina Paolina Petrizzo, 2 Dec 1786), three are third cousins once removed (Michele Zozzaro and Giovanna Antonia Calandriello, 15 Nov 1803; Domenico Zozzaro and Arcangela Laveglia, 25 Jan 1798; Giovanni Caporrino and Raffaela Trotta, 17 Dec 1837), and one is a second-cousin-once-removed marriage, Sebastiano Nicola di Stavola and Rosa Pinto (6 May 1757), through Vito Orso Petrizzo. One couple already in the count moved to a closer relationship because the new links revealed a nearer ancestor: Giaccobbe Pasquale Cammarano and Barbara Videtta (25 Apr 1821) moved from third cousins once removed to third cousins. Fourth cousins rise to 507, third cousins once removed to 351, third cousins to 310 and second cousins once removed to 97. Second cousins stay at 102, second cousins twice removed at 13, first cousins at 34, first cousins once removed at 29 and first cousins twice removed at 1. The earliest marriages on record are unchanged. Multi-generational cases rise to 1,023.

What surprised us more was how often it repeated. 1,023 people in the tree are both the child of a cousin marriage and went on to marry a cousin themselves — three, sometimes four consecutive generations of the same two family lines marrying back into each other, rather than a single instance diluted by outside blood.

And it wasn't left behind when the Sassanesi crossed the Atlantic. Sixty-three of these cousin marriages involve a bride or groom who eventually settled, married, or died in Chicago; another 45, though they took place back in Sassano, produced children who made the crossing themselves. All told, roughly one cousin marriage in thirteen connects to the Federal Street enclave.

A related pattern, where two brothers married two sisters from another family (or a brother and sister each married the other family's counterpart), is traced on the Notable records page. The children of those unions were double first cousins, and the tree contains one marriage between two of them: Francesco Ferro and Rosa Ferro, in 1895.

Some of the names will be familiar to anyone who has followed our Home page and Families list. Pietro Abbatemarco and Francesca Trotta, one of the earliest couples in our founding family records, were third cousins. Gabriele D'Amato and Maria Rosa Ricciardone were third cousins as well — a marriage that took some untangling, since Maria Rosa turned out to have married twice: first D'Amato in Sassano in 1889, then Michele Riccio in Chicago in 1898. The first marriage ended in divorce rather than widowhood; Gabriele moved to New York and married Luisa Curcio in 1896. No record of the divorce itself has been found. Closer to home for this site's author: Francesco Cavallone and Rosa Libretti, married in Sassano on 22 Jan 1899, were first cousins once removed — Antonia Francesca di Bella was Francesco's grandmother and Rosa's great-grandmother. Francesco is the same great-grandfather whose long-sought birth record — and the brick wall it finally brought down — is described on the About page.

None of this is unusual for a town like Sassano, and we don't share it to cast any judgment on any family, ours included. Small, isolated communities the world over — mountain villages, island populations, tightly bound immigrant enclaves like the one on Federal Street — show this same pattern, for the same plain reason: the pool of people you were likely to meet, court, and marry was small, and church and family kept you close to those you already knew. For most of Sassano's history, marrying within one's own extended kinship network wasn't the exception. It was close to the rule.

It's worth a brief, honest word on what that can mean medically. Modern genetics tells us that closely related couples have a somewhat higher chance of passing the same rare gene to a child, nudging the risk of certain inherited conditions upward — for first cousins, roughly from a general-population baseline of 3–4% to something closer to 4–6%. The effect fades quickly with distance; second, third, and fourth cousins are genetically close to unrelated pairs. Where it can matter more is exactly the pattern we found here — the same two lines intermarrying across several generations running — which is one thread, among several including poverty, poor sanitation, and limited medical care, that may help explain the high rate of infant and child death visible elsewhere in these records. It is context, not a diagnosis of any one family or descendant.

Mostly, what the numbers tell us is a story we already knew in outline: for two centuries, Sassano was a place small enough that nearly everyone was, in some fashion, everyone else's cousin — and that closeness is written into nearly every family line that eventually found its way to Federal Street. The share has now edged past one marriage in five, even as hundreds more individuals keep being added.