Sheehan i don't see the problem.
On this international fruitforum a member askes what mangotree JAK/77 might be. Well i think of a giant mango but can't declare the number 77. Yak,Yok,Yak, Jak, Jac, Chak can all be the same when translated from thai/khmer language since there are no rules for translating to our alphabet.
If you go to jatujak, chatuchak market and ask for a yak, yac, jac, jok, joc mangotree they will sell you a giant mango variety.
Mr. Zills uses Asian mango's to develop new variety's so to me it sounds possible that this is a giant mango and if not than not, big deal.