Last name Stefl (Stefl 
) , throughout the world, is quite a rare family name. The cognomen Stefl is characteristic of Czechia, where it is quite a rare surname, Austria, and Slovenia, where it is a rare surname. In absolute terms, the name is most common in Czechia, the United States, and Austria.
| VARIANT | COUNTRY |
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| Stefl | Germany, Czechia, Austria, United States, Poland |
| max stefl German librarian (1888-1973), DE (b. 1888) |
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| mark stefl college basketball player (1977–1978) Cal State Long Beach |
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| martin stefl researcher ORCID ID = 0000-0001-8436-5581 |
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