This guy is based off of the Wood Thrush.
The marking could simply be called Thrush.
ThrThr | Thrthr
There can also be variance in the marking, with the spotting going all the way down the horse [V1] or just on the chest. [V2]
There are a few different types of "thrush" which could make for a variety of markings in the Thrush category. Most of the differences appear to be on the face, near the eye.
Examples:
Photo Credits: