Complex sentence: In the meantime, Gama made do with a substantial hereditary royal pension of 300,000 "reis", and the award of the noble title of "Dom" (lord) in perpetuity for himself, his siblings and their descendants.
Split into simpler sentences: In the meantime, Gama made do with a substantial hereditary royal pension of 300,000 "reis". He was awarded the noble title of "Dom" (lord) in perpetuity for himself, his siblings and their descendants.