Complex sentence: Her paternal grandfather was Charles Wood, a gilder and picture framer from Bolton, so her father called himself Charles Haigh-Wood to distinguish himself--the "Haigh" came from his mother, Mary Haigh, originally from Dublin.
Split into simpler sentences: Her paternal grandfather was Charles Wood, a gilder and picture framer from Bolton, so her father called himself Charles Haigh-Wood to distinguish himself. The "Haigh" came from his mother, Mary Haigh, originally from Dublin.