So what does a "Brock" look like?

Researchers at Miami University have found that certain names have predictable subjective associations with certain facial features.

For example, when people hear the name “Bob” they have in mind a larger, round face than when they hear a name such as “Tim” or “Andy.” Robin Thomas, associate professor of psychology, and colleagues not only show that this link exists, but they also show that if people try to learn face-name pairs that go against their expectations, they have a hard time doing it.

[...]

Participants were asked to create faces appropriate for 15 specific names using face construction software, similar to programs used by the police in eyewitness identification. A second group of participants generally endorsed the faces as fitting the names: Most predictable name-face matches were Bob, Bill, Brian and Jason. “These prototype faces that seem to exist for different names are not just idly occupying space in our mind, but have implications for how easily one learns the names of individuals,” says Thomas.

"An entire lecture hall of students chose the bearded man as Tim and the round-faced man as Bob."

(Via Metafilter.)