Elias Hiam Lindo, The history of the Jews of Spain and Portugal, from the earliest times to their final expulsion from those kingdoms, and their subsequent dispersion: with complete translations of all the laws made respecting them during their long establishment in the Iberian peninsula (1848), Chapter I, Early Settlements of the Jews in Spain and Portugal, p.1-7 (hipóteses sobre emigração), p.7 (etimologia de Don) [google books]
