Surname Postlewait (Postlewait 
) , globally, is a rare cognomen. The last name Postlewait is characteristic of the United States, where it is a rare surname, Canada, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Postlewait | United Kingdom, United States, Philippines, Canada |
| kathy postlewait professional golfer, US (b. 1949) |
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| thomas postlewait (b. 1941) |
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| caleb postlewait US association football player, US (b. 1993) |
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