Data Validation and Dynamic Named Ranges

Hello again,

I have attached a sample document. In column B of Sheet1 I would like each cell to populate drop downs based on what is chosen in column A. (Ex. If "January One" is chosen, then the "JanuaryOneContacts" list should appear in a drop down in column B.

Note: The separate lists in "Background Info" are populated through a simple autofilter/paste macro. I dont think this should affect my problem though.

Thanks!