A few ideas for the acronysms:
Forum Zionism-Judaism (or Jewish)
Forschungszentrum Jülich
Forum ZJ (zj is a model of Jeep Grand Cherokee)
FZ journal (in germany)
F for free, forum, first, faculty, ford, fast, food, fond, find....
Z for zone, zero, zoo, zoom, zombie, zip, Zion, Zionism, Zeus, zeppelin, zebra, Zapata...
J for jurnal, jeep, Jesus, Jehova, Japan, java, javascript, Judaism, Jewish, ...
as you see you can find lots of acronym for these three letters...
Happy bidding,
Taz