create text string: "NOT "[b2value]", NOT "[b3value]", ..., NOT "[b600value]"

I want to do an advanced search of a database using keywords that produce many results. To make the results more manageable, I want to filter out the results that I have already recorded in my existing worksheet, "Data".

Data!D1 is a header, "FirstLast", with a reference list in D (list is of first and last names). Formula in D2 =CONCATENATE(B2, " ", C2) which I copied down to D969. Entries in D are not all unique (though some are); some names appear several times.

See attachment for illustration. Described further:
Goal1: I want to generate a list of all unique D values (i.e. ignores duplicates) in Column B of a new sheet, "Summary", in the same workbook.
My attempt:
B2 =INDEX($A$2:$A$969, MATCH(0, COUNTIF($B$1:B1,$A$2:$A$969), 0))
But that returns #N/A in B2 after pressing ctrl+shift+enter.

Goal2: I want to generate a single string of text showing all Summary!B values in quotes, each with 'NOT ' preceding it and with a comma directly following the endquote. (I want to copy this text into a database search so that I can filter out results already in my spreadsheet.) Basically, I want a formula that will produce text like this, all in one cell:
NOT "[B2Text]", NOT "[B3Text]", NOT "[EBText]", ... , NOT "[LastBEntryText]"


My guess is it is something like: =CONCATENATE(“NOT “”, B2, “”, ”, “NOT “”, B3, “”, ”, “NOT “”, B4, “”, ”, ...B?[End of my List #])

BUT how do I do this for the whole range so I don’t have to manually type B2-B6235484 in the formula? Also, I think getting quotes to appear is an issue for me

See attachment for illustration