Cognome

Costi

The strongest concentration of Costi in US arrival records points to Emilia-Romagna, with 6 of 22 arrivals (27 percent) originating there.

22

US arrivals
1830 to 1912

13

Comuni of
origin

10

Regioni
represented

6

Notable on
Wikipedia

Arrivals by regioneN = 22
Abruzzo: 1 arrivalsCalabria: 1 arrivalsCampania: 4 arrivalsEmilia-Romagna: 6 arrivalsLazio: 4 arrivalsLiguria: 1 arrivalsLombardia: 2 arrivalsMolise: 1 arrivalsSicilia: 1 arrivalsVeneto: 1 arrivals

Top regione

Emilia-Romagna

6 of 22
27 percent of arrivals

Arrivals
0
1
2
3 to 5
6+

Cittadinanza per discendenza

Could your Costi line qualify for Italian citizenship?

The largest share of Costi arrivals came from Emilia-Romagna, most often from the provincia of Reggio nell'Emilia. If one of them is your ancestor, Italy may recognize you as a citizen under jure sanguinis (citizenship by descent).

The surname alone does not decide it. Each generation between that ancestor and you does: who naturalized, and when. Since the 2025 law, the number of generations matters too.

The checker goes back through your line one generation at a time. It is not legal advice, and it does not search for records.

Check your line
Your lineYou fill this in

Italian-born ancestor

A Costi from Emilia-Romagna

Most often from Reggio nell'Emilia (RE)

Each generation between

Name and dates

Did this person naturalize before their child was born?

You

A likely outcome

and the documents your line would need

Not ready to start? Get an email when the citizenship rules change.

Persone notevoli

Notable Costi on Wikipedia

  • Silvano Costi

    IT

    1927 · Roma

  • Renzo Costi

    1937 · Reggio Emilia

  • Robinio Costi

    IT

    1943 · Roma

  • Giandomenico Costi

    ENIT

    1969 · Sassuolo

  • Eleonora Costi

    IT

    1983 · Mirandola

  • Fabiana Costi

    IT

    1986 · Reggio Emilia

Varianti grafiche

Spelling variants worth checking

  • The spelling you know may not be the one in the records. For example, a family remembers Mansini, but the records read Mancini.
  • If your spelling does not appear, a close variant in the list below may be the same family.

Related guide

Myths About Name Changes at Ellis Island

Names were never changed at the border. The spelling here is the original Italian: Giovinelli in the records, perhaps Jovanelli in the family today.

Read guide

Costia

1 US arrivals

Costietti

1 US arrivals

Costini

7 US arrivals

Costina

6 US arrivals

Costine

3 US arrivals

Variants are surfaced from the surname index, not from per-name research. None of these is guaranteed to be the same family as Costi.

Origini per comune

Arrival records by comune

Each row is a comune (municipality) where at least one passenger named Costi was recorded between 1830 and 1912.