Family name Tiensuu (Tiensuu 
) , globally, is a rare surname. The family name Tiensuu is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is quite a rare surname, and Denmark, where it is a rare surname.
| VARIANT | COUNTRY |
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| Tiensuu | Sweden, Norway, Estonia, Finland, Denmark |
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tuukka tiensuu Finnish television director, FI (b. 1976) |
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| raili tiensuu Finnish actress (1934–2018), FI (b. 1934) |
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| kyllikki tiensuu Finnish professor of church history, FI (b. 1945) |
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| jukka tiensuu Finnish composer, harpsichordist, pianist and conductor., FI (b. 1948) |
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| roland tiensuu student and environmentalist from Sweden, SE |
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| antti tiensuu Finnish actor, FI |
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| hannu tiensuu FI |
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| jussi tiensuu FI |
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| akseli tiensuu Finnish futsal player, FI (b. 1997) |
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Mr, Elin, Erno, Emmi, Eija, Heli, Vesa, Iiro, Maria, Manne, Matti, Maija, Mette, Milla, Minna, Mikko, Sanni, Sirpa, Seppo, Sylvi, Antti, Katri, Nico, Timo, Tero, Jyri, Ms, Ari, Pia, Tom, Esa, Mika, Sara, Sari, Sami, Samu, Kalle, Sini, Alpo, Annu, Aapo, Kari, Piia, Leif, Jane, Joni, Juha, Juho, Alma, and Kaisa