The House Catanzaro Insignia is carried by Umar Catanzaro, who is found in the Underground River in Baldur's Gate: Siege of Dragonspear. This item and the House Ryrrl Insignia, carried by Kaelet, can be given to Shapur to prove that the two escaped drow were killed or escaped as part of the Drow Runaways quest.
Description[]
“ | This silver insignia bears the crest of a drow family. | ” |