Complex sentence: Patrick's brothers and sisters were nearly all educated in Catholic schools and colleges, and they also achieved notable firsts for Americans of mixed-race ancestry during the second half of the 19th century, making the Healy family of Georgia a notable one.
Split into simpler sentences: Patrick's brothers and sisters were nearly all educated in Catholic schools and colleges. They nearly all achieved notable firsts for Americans of mixed-race ancestry during the second half of the 19th century, making the Healy family of Georgia a notable one.