The Echevarria system was a star system in the Beta Quadrant. This system was further away from Romulan territory than the Nequencia Alpha and Carraya systems.
In 2369, the YLT-3609, piloted by the Yridian Jaglom Shrek, would visit this system. The flight plan of the Yridian shuttle, which included this system, was displayed on the bridge of the USS Enterprise-D while searching for Worf. (TNG: "Birthright, Part II", production art)
This system was only mentioned in writing.
This system's quadrant of origin is inferred based on the position of Carraya and Nequencia as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".
The Echevarria system was named for episode writer Rene Echevarria. Alpha Echevarria IV might be part of this system.