Cognomen Keefler (Keefler 
) , all over the world, is a very rare surname. The cognomen Keefler is habitual in Canada, where it is a very rare surname, Mexico, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Keefler | Mexico, United States, Canada |
| thomas twining keefler Canadian politician (1824-1906), CA (b. 1824) |
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| nicole keefler Canadian writer, CA (b. 1963) |
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