Please help me with this imponderable. [View all]

I'm trying to find any records of my paternal grandfather who was born in Panevezys, Kaunas, Lithuania, a small town.

His birth (non-Hebrew) name was Vulf Kez. The records say he was born in March 20, 1877.

Here's my question: two other Vulf Kezes were also born in that small village, one on May 24 and December 7, 1877 the same year.

Why on Earth would you name three different boys the same first and last names in a small town in Lithuania? I doubt it was because they were called by their middle names. What were the parents thinking? And I would guess that the parents were all related (let's say three brothers). Who does that???