Last name Halmøy (Halmøy 
) , in the world, is a very rare cognomen. The cognomen Halmøy is characteristic of Northern Europe, particularly Norway, where it is a rare surname.
| konrad halmøy Norwegian politician, NO (b. 1870) |
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| egil halmøy Norwegian politician (b. 1901) |
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| skjalg halmøy NO (b. 1914) |
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| sissel halmøy (b. 1956) |
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