Family name Fontanelle (Fontenelle 
, Fontanelle 
) , in the entire world, is quite a rare surname. The cognomen Fontanelle is habitual in Saint Lucia, where it is a common surname, Barbados, where it is quite a rare surname, and Belgium. Measured by absolute frequency, the name is most common in Brazil, France, and the United States. Much less frequently, Fontanelle is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fontenelle | Brazil, France, Saint Lucia, United States, Belgium |
| Fontanelle | Brazil, United Kingdom, France, United States, Italy |
| alfred david augustus d'espinassy de fontanelle GB (b. 1827) |
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| marquis marius d'espinassy de fontanelle Peerage person ID=280518 |
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| benjamin fontanelle French motorcycle rider, FR |
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Mr, Angie, Artur, Chris, Cesar, Brian, Bruno, Bruna, Blake, Karen, Kenza, Paris, Paulo, Peter, Ramon, Raoul, Romeu, Renan, René, Laura, Lilia, Loïc, Andre, Sofia, Mehdi, Marie, Ms, Le, Ann, Kim, Ruy, Guy, Eni, Iza, Anna, Casa, James, Rosa, Gino, Leon, Luis, Joao, Tais, Tony, Eloi, Eric, Iara, Maria, Rene, and Jorge