Other contributors have said "What did 49ers derive from during the gold rush?" is the same question as "Why were gold rush prospectors called 49ers?" If you believe that these are not asking the same thing and should be answered differently, click here

Why were gold rush prospectors called 49ers?

Answer:

They were referred to as "49ers" because that was the year the California gold rush started (1849).

First answer by Mrgallant. Last edit by Mrgallant. Contributor trust: 130 [recommend contributor recommended]. Question popularity: 1 [recommend question].