 This was because Kwok-tai fathered five sons and two daughters, while Fung-shee made a will in her later years to pass on part of her assets to a brother known as "Yung Hin-kwan", who was believed to be one of Kwok-tai's sons (whose name is rendered as "" in Chinese).It is also speculated that she might be the daughter of Yung Pui-yiu (, also named Yung Kwok-tuen []; 1873 – 1917), Yik-ting's twelfth younger brother, because in the Yungs' genealogy book, it shows that Pui-yiu had two sons and seven daughters, while three of his daughters' marital status was not displayed; in spite of that, it can also mean that they were not married by the time of revising the genealogy book.In an article about the life of Fung-shee published by the "South China Morning Post" in 1972, it stated that she had five brothers, increasing the probability of her being Kwok-tai's daughter.