Extracting data from Arrays in ISAM table

["boclair@xxxxxxxxxxx" <boclair@xxxxxxxxxxx>]

I have a table with between 100k and 200k rows.  One field, `names`, is 
populated, in each row, with an imploded array of up to 4 names.

I require to create a list of names, without repeats, of all the names 
in `names` field to use in an html form.

Any advise would be appreciated.  I have no ideas on how to start.

Louise