Modern scholarship documents that survivors of the 1391 massacres either converted, often under direct threat, or fled to Islamic-ruled territory, Navarre, Portugal or France, but no source checked gives a reliable numeric total for those who fled distinct from those who converted or were killed. The one round figure found in circulation (a "100,000 fled" alongside equally round conversion and death figures) is inconsistent with the death-toll range already carefully sourced here and was judged unreliable rather than written.
What would resolve this A demographic study of Iberian Jewish community registers or tax rolls before and after 1391, cross-referenced against the destinations named in contemporary accounts (North African, Navarrese and Portuguese Jewish community records), of the kind that has been done for the 1492 expulsion but not, so far as could be found, for 1391 specifically.
OpenHistorical demographyDavid Nirenberg, Nirenberg, Neighboring Faiths: Christianity, Islam, and Judaism in the Middle Ages and Today (2014)