Hi!

Maybe this:

=SUMPRODUCT(--(A1:A100="last_name"),--(B1:B100="first_name"),C1:C100)

OR....

Redo your lookup table so that the first column includes both
lastname,firstname

OR....

Assume lookup table is such:

Column A = lastname
Column B = firstname
Column C = student number

D1 = Williams
E1 = Venus

=INDEX(C1:C100,MATCH(D1&E1,A1:A100&B1:B100,0))

Array entered using the key combo of CTRL,SHIFT,ENTER.

Biff

"SL" wrote in message
...
I am using two spreadsheets. Both spreadsheets have last name and first
names of students from our school. I am trying to lookup the student
numbers
from one spreadsheet and populate to the other. I can do it just fine
except
when there are duplicate last names. Does anyone know how to lookup more
than just one column on duplicate last names. Example, Williams (last
name)
tons of them, I need Excel to look at Williams and first name (Jane)
before
returning the student number.

Thanks. SL