Last name Estenaga (Estenaga 
) , in all the world, is a very rare surname. The cognomen Estenaga is characteristic of Spain, where it is a very rare surname, New Zealand, and Australia. In absolute terms, it is commonest in Spain, France, and Argentina. Much less frequently, Estenaga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Estenaga | Spain, Australia, Argentina, France, New Zealand |
| francisco martinez estenaga Spanish politician, ES (b. 1921) |
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| angela estenaga researcher |
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| amaia elizalde estenaga ES (b. 1988) |
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