|BTW...the formula I suggested above, which returns a value from a cell, just happens to a return the name of a month because that is what is in Row 1.|
This formula will return the name of a month without needing to have the months in Row 1:
This works by multiplying the value returned by the MATCH function (which will be 1 - 12) by 29 to get a specific value:
0, 29, 58, 87...348.
Each of those numbers is recognized as the serial number of a specific date in Excel.
The TEXT function then returns that "date" formatted with mmmm which means "the full month's name". January, February, March, etc.
mmm would return Jan, Feb, Mar, etc.
To prove this to yourself, test this:
=TEXT(MATCH(MIN(A3:L3),A3:L3,0)*29,"mmm dd yyyy")