Is there a specific name for this feature:
I think this is purely for aesthetics, generally a horizontal mini-roof that connects the lowest points of a gable end. I believe it's to visually break up the otherwise large expanse of side wall, although without a term to look up I'm finding it hard to research.
Best Answer
As answered in the comments, it looks like this feature has a few names:
There are a handful of colloquial terms for specific types of "eave returns" - "pork chop returns", "mutton chop returns", "bird boxes".
Sources: