Surname Steiro (Steiro 
) , in all the world, is a rare family name. The surname Steiro is characteristic of Norway, where it is quite a common surname, Canada, where it is a very rare surname, and Australia. In absolute terms, it is commonest in Norway, the United States, and Canada.
| VARIANT | COUNTRY |
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| Steiro | Australia, Canada, Norway, United States, United Kingdom |
| jens steiro Norwegian policeman, farmer and politician (1874-1939), NO (b. 1874) |
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| per harry steiro Norwegian association football manager (b. 1961) |
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| karoline steiro Norwegian tennis player, NO (b. 1989) |
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| øystein steiro Norwegian tennis player (b. 1992) |
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| mariann ylajali steiro (b. 1983) |
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Mr, Marte, Carol, Bente, Brith, Keith, Paula, David, Diane, Gaute, Leigh, Linda, Jolee, Jerry, Tomas, Terje, Trine, Espen, Helen, Heidi, Hedda, Vivie, Marit, Åge, Hege, Hank, Ms, Dag, Liv, Tor, Tom, Tim, Odd, Mari, Carl, Bjã, Wenke, Knut, Dale, Gard, Lene, Liss, Lisa, Tare, Tore, Eric, Erik, Hans, Rune, and Marius