Cognomen Trefgarne (Trefgarne 
) , in all the world, is a very rare last name. The family name Trefgarne is habitual in Austria, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Spain.
| VARIANT | COUNTRY |
|---|---|
| Trefgarne | United Kingdom, United States, Austria, Spain |
|
george trefgarne, 1st baron trefgarne British politician (1894-1960), GB (b. 1894) |
|
|
david trefgarne, 2nd baron trefgarne British Baron (born 1941), GB (b. 1941) |
|
| trevor garro trefgarne second son of 1st Baron Trefgarne (born 1944), GB (b. 1944) |
|
|
| mary elizabeth trefgarne (born 1946) (b. 1946) |
|
|
| gwion noel garro trefgarne (born 1953) (b. 1953) |
|
|
| george garro trefgarne (born 1970) (b. 1970) |
|
|
| rupert michael garro trefgarne (born 1972), GB (b. 1972) |
|
|
| justin peter garro trefgarne (born 1973), GB (b. 1973) |
|
|
| oliver edward garro trefgarne (born 1974), GB (b. 1974) |
|
|
| rebecca rosalie trefgarne (born 1976) (b. 1976) |
|
|
| susannah julia trefgarne (born 1976) (b. 1976) |
|
|
| mark michael garro trefgarne (born 1982), GB (b. 1982) |
|
|
| samuel ivor garro trefgarne (born 1987) (b. 1987) |
|
|
| camilla amélie trefgarne (born 1988), GB (b. 1988) |
|
|
| hannah elizabeth trefgarne (born 1989) (b. 1989) |
|