About David ben Yehuda ibn Yahya, Charlap
According to the "Das Jachia Dokument" Don David ben Yehuda was the last family member with the name Ibn Yahya in that lineage. Rabbi in Salonica and Constantinople.
CRLB == Chakhamim Rishon Lechamim l'Burtuqali (Portugal)
Teachers and sages who were the first ones providing sustenance in Portugal.
Later revised to mean
CRLP == Chakhamim Rishon Lechamim l'Polin (Poland)
Teachers and sages who were the first ones providing sustenance in Poland.
Due to the recent discoveries the writer hypothesizes that Don David came from Salonica and became a Rabbi of Deneburg. He gave rise to the two main family names: Don Yahya (Donchin) and Charlap (and variants) in the Polish-Lithuanian Commonwealth. Also the author suspects that the title CHRLP ("the Wise Jew") was given by King Alfonso V to David's direct paternal ancestor: Yosef ben David ibn Yahya (1425-98) in fifteenth century.