As steeldriversteeldriver answeredanswered and murumuru answered, bash has a brace expansion feature that can solve your problem:
array1=( JF-{1998..2011} )
and
array2=( {JF,RFS,JFI}-1998} )
or even all together:
array3=( JF-{1998..2011} {JF,RFS,JFI}-1998} )