I have been looking at this name too. There are one or two references to the name in the immigration lists. A Bozus family arrived in the US in 1913 from Poland. Another man arrived 1891 also from Poland. In 1894 the Bozuslowsky family arrived from Russia. In 1839 a Mary Bozus who was born in England married a Richard Butler in England. I can find no trace of her parents except that her father was John. There is only the one Bozus on the English database so I'm guessing her parents were from Eastern Europe too.