Correct spelling for the English word "jaumange" is [d͡ʒˈɔːmand͡ʒ], [dʒˈɔːmandʒ], [dʒ_ˈɔː_m_a_n_dʒ] (IPA phonetic alphabet).
A variety of blancmange; Dutch flummery.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.