Teodorico’s mother was Nicolosa Piccioni, born in Fermo on March 14th, 1650, daughter of another notary, Giovanni Francesco Piccioni, from Altidona.
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His father, Giovanni Francesco Pedrini, who had been born in Servigliano on February 5th, 1630, had worked as notary in his native town for two years from 1654 to 1656, before going to Rome for ten years, as Chancellor for the Auditor Camerae.