Catalan Zodiac Rose S.XV

[quimqu]

I am a bit puzzled with some characters, mainly the g very simmilar to the Voynich. For example saturn, the planet for Capricorn and Aquarius. In Capricorn it is written "saturnus", but in Aquarius is written "saturiag". The "g" appeara also at the outer ring, at the low left position (november), where you have "filig" and oposite of this, at the top right position (below maig may) we have "filia". There are other words ending with this "g". 

Anybody knows what this character "g" stands for?