Thetis Regio (Venus)
Greek Titaness.
A regio is a large area marked by reflectivity or color distinctions from adjacent areas, or a broad geographic region. On Venus they are named after giantesses and Titanesses (also two Greek alphanumeric).
Image Source. Marker locations are approximate and may not always appear to align with image on map.
Thetis Regio
-11.4° N 129.9° E