Family name Roininen (Roininen 
) , around the globe, is quite a rare last name. The cognomen Roininen is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is a rare surname, and Estonia. Not in comparison with a country's population, it is commonest in Finland, Sweden, and Canada.
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| Roininen | Poland, Canada, United States, Sweden, Finland |
| vilho roininen Finnish lieutenant colonel, FI (b. 1893) |
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| leo roininen Canadian javelin thrower and shot putter, CA (b. 1928) |
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tommi roininen Finnish volleyball player, FI (b. 1984) |
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| paavo roininen Finnish boxer, FI (b. 1935) |
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| annukka roininen Finnish journalist and editor, FI (b. 1976) |
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| heikki roininen Finnish entomologist, FI |
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| lassi roininen researcher ORCID ID = 0000-0002-7014-6684 |
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| saara roininen researcher |
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| janne roininen FI |
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| riitta roininen FI |
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| irma roininen FI |
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| saija roininen FI |
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| teemu roininen FI (b. 1986) |
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Mr, Dale, Jani, Jari, Joni, Jere, Juha, Juho, Tero, Timo, Rami, Tiia, Niko, Niku, Ella, Essi, Eric, Emil, Emmi, Emmy, Heli, Nico, Kiia, Kari, Aapo, Ms, Mia, Anu, Kht, Kim, L J, Tom, Esa, Eve, Mark, Mira, Mika, Miia, Sami, Satu, Sini, Anna, Anne, Arto, Arja, Aake, Ismo, and Iina