Cognomen Keiser (Keiser 
, カイザー 
, Кайзер 
, along with others...) , throughout the world, is a common last name. The cognomen Keiser is characteristic of Switzerland, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and Kazakhstan. In absolute terms, the name is most common in the United States, Switzerland, and Germany. Likewise, Keiser is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Keiser | Switzerland, India, France, United States, Germany |
| カイザー | Japan |
| Кайзер | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Кейсер | Kazakhstan, Russia, Ukraine |
| كيسر | Morocco |
| georg keiser Gunsmith (b. 1647) |
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| gottfried keiser (b. 1650) |
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| johan harmen keiser Dutch judge (1668-1718), NL (b. 1668) |
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| reinhard keiser German opera composer, DE (b. 1674) |
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maria johanna hermanna keiser 27 Nov 1739 Groningen - 16 Aug 1816 Leeuwarden, NL (b. 1739) |
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| gerhard jacob keiser Dutch judge (1701-1785), NL (b. 1701) |
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| johannes keiser 12 Feb 1708 Groningen - 12 Apr 1748 Groningen (b. 1708) |
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| karl joseph keiser CH (b. 1702) |
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| sophie dorothea louise keiser (b. 1712) |
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| jacob warmolt keiser Dutch judge (1737-1821), NL (b. 1737) |
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| johann martin christian keiser (1750-1821), CH (b. 1750) |
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ludwig keiser (1816-1890), CH (b. 1816) |
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| gerhard jacob keiser Dutch lawyer and politician, NL (b. 1770) |
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| j.h. keiser (b. 1760) |
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| franz xaver keiser (1780-1855), CH (b. 1780) |
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