what is significant about the narrators name -

We are told that Pi or Piscene was named after a family friend who frequented the swimming pool Piscine Molitor in Paris. Pi doesn't get the friend's name rather than the pool's name. The name is shortened to avoid harassment from other kids (they used the word "pissing"). I can only speculate on the mathematical relationship that his name has. Pi represents an irrational number that goes on forever. We might examine if there are similarities to this in Pi's personality.

What is so significant about his name and being named after a pool is how much water and swimming will mean in his future.