BnF Français 19994 is 15th century French manuscript about medicine ( visit here ) which caught my attention with the way the names of the months in the calendar are spelled. The scribe used the 'open E' letter similar to the one used by the person who added the months in the Voynich Manuscript (that person most likely was not the author of the VMs).
The months of December, November, May and March give nice matches.
The rest of the months don't match as well.
The calendar in BnF Français 19994 is made for use in Toulouse, Southern France. This may not be related to the scribe, but to the text, which is based on work of the 14th century surgeon Guy de Chauliac (native of Toulouse). Chauliac is famous for his book Chirurgia Magna. Among other tools he used crossbow as surgical instrument.