Family name Slapničar (Slapničar 
) , globally, is a very rare cognomen. The last name Slapničar is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname, and Croatia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Slapničar | Slovenia, Croatia |
| sergeja slapničar researcher |
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| ivan slapničar Ph.D. Fernuniversität Hagen 1992 |
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| gašper slapničar SI |
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| darja slapničar SI |
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| sergeja slapničar SI |
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| miha slapničar SI |
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