A person's character and personality can easily be known by the type of people he or she befriends. This means if your friends are known for bad behavior, you are also likely to have bad behavior and if your friends are good, you are likely to be good too.
sado
Truman
Aesop's Fables
johnson jon ridge
This is not an idiom. It means exactly what it says. The company that this person keeps is not a good group of people.
Abraham Lincoln
Imprisoned (I think) means to be stuck somewhere, like: They were imprisoned in a big cage. A companion is someone who keeps you company. Companions would be then one person who keeps you company.
The Poor Richards proverb is, A man is known by the company he keeps. This means that people are judged to be like those they hang around with, whether they are or not.
Domain buyer
The person who had invented Prozac in 1988 was Ray Fuller. The company was known as the Eli Lily Company.
A person who keeps bees is a Beekeeper or Apiarist.
Igloo is a very well known company that manufacturers ice chests. Another company that is on the rise is YETI. They produce an ice chest that is durable and keeps ice frozen for 4 days.