Family name Costalonga (Costalonga 
) , globally, is quite a rare surname. The family name Costalonga is habitual in Brazil, where it is a rare surname, Italy, and Estonia. In absolute terms, it is the most numerous in Brazil, Italy, and France.
| VARIANT | COUNTRY |
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| Costalonga | France, Argentina, Italy, Brazil, United States |
| gaetano costalonga Italian painter (1726-1816), IT (b. 1726) |
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| mario costalonga Italian musician, IT (b. 1932) |
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| franco costalonga Italian painter (1933-2019), IT (b. 1933) |
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| e c costalonga researcher |
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| massimo costalonga researcher ORCID ID = 0000-0001-5922-3709 |
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Mr, Deni, Davi, Lais, Lise, Lolo, Luci, Luca, Luis, Luiz, Jair, Jose, Josi, Joao, Joel, Joã, Jean, Juan, Theo, Nila, Nilo, Neto, Ryan, Ruth, Rita, Rene, Ms, Ze, Max, Ana, Luz, Eva, Ida, Mara, Meli, Sara, Elza, Alex, Agda, Caio, Caua, Braz, Kaua, Keli, Phil, Raul, Rosa, Romy, Anna, and Edna