Kammala wannan jumla: Count Gérard Le Grelle, ɗan Joseph J. Le Grelle, ya kasance mai banki kuma ya kafa kamfanonin inshora Securitas (1819) da L'Escaut (1821). Yanayinsa ba shi da dadi, kamar yadda duniyar kasuwanci ke ƙara tallafawa Orangism (Jamhuriyar Holland) saboda tsoron ganin Scheldt ya sake toshewa da Netherlands. Wani mai goyon bayan Belgium tun lokacin da yake makaranta a Brussels tare da Farfesa Jean-Baptiste Lesbroussart, Gérard ya tabbatar da kansa, tsakanin 1815 da 1830, ta hanyar ƙin yarda da duk wani ofishin gudanarwa ko siyasa a karkashin tsarin mulkin Holland har ma ya ƙi da shawarar da za a nada shi a matsayin mai ba da shawara na gari. Maimakon haka, ya fi son ya mai da hankalinsa ga birnin Antwerp da kuma bankinsa. Tare da 'yan'uwansa Henri (1798-1872) da Edmond (1805-1876), ya kasance mai motsawa a bayan bankin, wanda ya taka muhimmiyar rawa wajen ba da kuɗin birnin Antwerp bayan da
'yancin kai na Belgium a 1830. Tare da Bankin Rothschild, Bankin Le Grelle yana cikin manyan masu ba da kuɗi na Papal States (wanda a lokacin ya wakilci kashi ɗaya cikin huɗu na Italiya, daga kudancin Rome zuwa Bologna) kafin haɗin Italiya ta hanyar Peter's Pence a 1854 da 1864. Sunan Count Gérard Le Grelle ya kasance a haɗe da sanannen roƙo don 'yancin addini a 1825, wanda ya sa Roma ta goyi bayansa a 1852.