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| Contemporary Notables of the name Postlethwait (post 1700) | + |
- Clarence Eugene Postlethwait (d. 1950), American Sergeant First Class, recipient of the Distinguished Service Cross (Posthumously)
- John H. Postlethwait, American professor of biology and author at University of Oregon
| Related Stories | + |
| The Postlethwait Motto | + |
Motto: Semper paratus
Motto Translation: Always prepared.

