Surname Larreategui Cayetano (Larreategui Cayetano 
) , worldwide, is an extremely rare cognomen. The family name Larreategui Cayetano is habitual in Ecuador, where it is a very rare surname, and Spain, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Larreategui Cayetano | Spain, Ecuador |