Family name Tiitinen (Tiitinen 
) , throughout the world, is quite a rare surname. The cognomen Tiitinen is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Latvia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Finland, Estonia, and Thailand.
| VARIANT | COUNTRY |
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| Tiitinen | Estonia, Finland, Thailand, Latvia, Switzerland |
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esko-pekka tiitinen Finnish writer, FI (b. 1956) |
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seppo tiitinen FI (b. 1947) |
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| alpo tiitinen Finnish journalist, FI (b. 1917) |
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| veikko tiitinen Finnish actor, director and theatre manager, FI (b. 1922) |
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| kalevi tiitinen Finnish journalist, FI (b. 1958) |
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| atte tiitinen Finnish ice hockey player |
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| ilmari tiitinen Finnish musician, FI (b. 1983) |
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| pekka tiitinen FI |
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Mr, Juha, Juho, Jyri, Toni, Tero, Timo, Niko, Neea, Elna, Eero, Eetu, Heli, Vesa, Otto, Oona, Ulla, Marko, Marjo, Mandi, Matti, Maija, Joni, Jari, Jani, Luka, Ms, Kia, Pã, Jan, Ida, Mari, Manu, Mira, Mika, Sari, Mervi, Satu, Alex, Anni, Anja, Arto, Arja, Aino, Atte, Kari, Pasi, Piia, Sini, and Mirja