In the 2018 biography "Bruce Lee: A Life", Matthew Polly identifies Lee's maternal grandfather as Ho Kom-tong, who had often been reported as his adoptive grandfather. Ho's father, Mozes Hartog Bosman, was a Dutch Jewish businessman from Rotterdam. He moved to Hong Kong with the Dutch East India Company and served as the Dutch consul to Hong Kong at one time. He had a Chinese concubine named Sze Tai with whom he had six children, including Ho Kom Tong. Bosman subsequently abandoned his family and immigrated to California. Ho Kom Tong became a wealthy businessman with a wife, 13 concubines, and a British mistress who gave birth to Grace Ho.