Who is Bobby Watson from Four Plays and what is their importance?

"Bobby Watson" is the name of the Smiths' recently deceased friend, as well as the name of Bobby Watson's widow, in addition to his daughter and his son. In other words, Bobby Watson and his wife Bobby Watson had a daughter, Bobby Watson, and a son, Bobby Watson, both of whom are hopefully going to have their educations paid for by elderly family relatives (all of whom are named Bobby Watson). This comic repetition of the same name functions on two levels - to increase the satirical sense that all Englishmen are the same, and to reinforce the idea of the absurdity at the core of individual (or, in this case, non-individual) lives.