ity ▁in ▁her ▁own ▁right , ▁usually ▁a ▁life ▁peer ess ), ▁who ▁may ▁also ▁be ▁called ▁Baron ess ▁X ▁in ▁normal ▁speech , ▁though ▁Lady ▁X ▁is ▁also ▁common ▁usage . ▁Hence , ▁Baron ess ▁Th atch er , ▁a ▁suo ▁j ure ▁life ▁peer ess , ▁was ▁referred ▁to ▁as ▁either ▁" Bar on ess ▁Th atch er " ▁or ▁" L ady ▁Th atch er ". ▁" Bar on ess " ▁is ▁incorrect ▁for ▁female ▁hold ers ▁of ▁Scottish ▁Lord ships ▁of ▁Parliament , ▁who ▁are ▁not ▁Baron esses ; ▁for ▁example , ▁the ▁ 2 1 st ▁Lady ▁Salt oun ▁is ▁known ▁as ▁" L ady ▁Salt oun ", ▁not ▁" Bar on ess ▁Salt oun ". ▁ ▁A ▁peer ▁is ▁referred ▁to ▁by ▁his ▁peer age ▁even ▁if ▁it ▁is ▁the ▁same ▁as ▁his ▁surname , ▁thus ▁Baron ▁O wen ▁is ▁" L ord ▁O wen " ▁not ▁" L ord ▁David ▁O wen ", ▁though ▁such ▁incorrect ▁forms ▁are ▁commonly ▁used . ▁ ▁Some ▁pe ers , ▁particularly ▁life ▁pe ers ▁who ▁were ▁well ▁known ▁before ▁their ▁en no ble ment , ▁do ▁not ▁use ▁their ▁peer age ▁titles . ▁ ▁O thers ▁use ▁a ▁combination : ▁for ▁example , ▁the ▁author ▁John ▁Julius ▁Nor wich ▁was ▁John ▁Julius ▁Cooper , ▁ 2 nd ▁Vis count ▁Nor wich . ▁ ▁Ind ividual s ▁who ▁use ▁the ▁style ▁Lord ▁or ▁Lady ▁are ▁not ▁necessarily ▁pe ers . ▁Children ▁of ▁pe ers ▁use ▁special ▁titles ▁called ▁cour tes y