While it is also from obvious Jewish sources, it nevertheless seems to be a good tool to compliment Gesenius on the use of Hebrew in the early centuries of the Christian era.
A Dictionary Of The Targumim, The Talmud Babli And Yerushalmi, And The Midrashic Literature
Compiled by Marcus Jastrow, Ph. D. Litt. D. With an Index of Scriptural Quotations
Published by: Luzac & Co. in London and G. P. Putnam’s Sons in New York, in 1903