I'm afraid I don't know your family, however my family descend from Gabriel Raphael Costa 1742. He droped the da when he was married in Bevis Marks Synagogue, England. Now here's the part which caught my attention. Most members of our family have wonderful singing atributes, and have mainly been in show businesss which has been throught the centuries. Your clue will be the angels names, possibly a place called Trancoso in Portugal. My family were Spanish nobility converso!