Real examples: Big, Knife, Bread
Sometimes all you need is a one-word name. Like Rihanna. Or Shrek. When a restaurant makes the bold move of choosing a single-word signifier, they're showing they don't need to hide behind fancy adjectives or the name of the street. In the case of Knife, it also serves the purpose of letting Crocodile Dundee impress the ladies with his very best joke.
Real examples: Rustic House, Jack Allen's Kitchen, Cooks County
Given the proliferation of Southern and comfort foods, this trend is spreading fast. It can take some of the edge off a concept and creates a sense of accessibility. Antonym to the "Urban" naming convention.
Real examples: Uchiko (Uchi), Kuma's Too, Little Goat (Girl & the Goat)
When a restaurant spins off into a new place, insiders know there's an association. But to people less engaged with the food scene, it isn't immediately clear that there's a relation between the two restaurants. Giving this new restaurant a similar name builds the brand, gives immediate name recognition, and also gives someone the rare opportunity to add "Strikes Back" at the end of their name.