Family name Ladner (Ladner 
, Ладнер 
) , all over the world, is quite a common cognomen. The family name Ladner is habitual in Austria, where it is quite a common surname, Switzerland, where it is quite a rare surname, and the United States.
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| Ladner | Switzerland, Austria, United States, Argentina, Germany |
| Ладнер | Kazakhstan, Kyrgyzstan, Russia, Ukraine |
| johann ladner AT (b. 1707) |
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| heinrich ladner Oostenrijks; architect; 1777-08-12; Hittisau; 1844-08-20; Hittisau (b. 1777) |
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| matthias joseph ladner DE (b. 1812) |
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| william henry ladner Canadian politician (1826-1907), CA (b. 1826) |
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| frank ladner American politician, US (b. 1845) |
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heber austin ladner Mississippi Secretary of State, US (b. 1902) |
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| oscar ladner Viennese factory owner (1873-1963) (b. 1873) |
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| isacher ladner holocaust victim, b. 1880-01-26, AT (b. 1880) |
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| leon johnson ladner Canadian politician (1884-1978), CA (b. 1884) |
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| fanny ladner holocaust victim, b. 1887-09-10, AT (b. 1887) |
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| karl ladner DE (b. 1878) |
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| gertrude richards ladner (b. 1879) |
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| max ladner Swiss opinion journalist (1889-1963), CH (b. 1889) |
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sajda musawwir ladner American artist, US (b. 1940) |
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benjamin ladner American academic, US (b. 1941) |
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