Cognomen Llanwarne (Llanwarne 
) , all around the world, is a very rare family name. The surname Llanwarne is characteristic of Australia, where it is a rare surname, and the United Kingdom, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Llanwarne | United Kingdom, Australia |
| trevor llanwarne Government Actuary, 2008–14; consultant on strategic risk, since 2014 (b. 1952) |
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