What do the following name and words have in common?

DAN
FIN
PAR
GAR
PUN
VAN
FLOUR

Answer:

They can all be followed by ISH to form new, unrelated words:

DANISH
FINISH
PARISH
GARISH
PUNISH
VANISH
FLOURISH

Note: You could make a case for PUN and PUNISH being related.

Credit: 
LA Times Crossword
February 25, 2010
Jeffrey Wechsler
KINDA SORTA