Complex sentence: At an early age, he was adopted by his maternal uncle, Richard Blakemore of Velindre House, who brought up at the Melingriffith Tin Plate Works.
Split into simpler sentences: At an early age, he was adopted by his maternal uncle, Richard Blakemore. Raised by him at Velindra House, he was brought up at the Melingriffith Tin Plate Works.