Is it possible to have a data validation list to control the out come of another column?

For example:
Columns
A B
1 1 name1
2 2 name2
3 3 name3
4 4 name4
5 5 name5
6 6 name6

with the above example, what I am asking is it possible to select the number in column A and have it automatically place in column B the name that belongs to that number? I hope this is clear.

Thank You,
Chris