While doing some reading on the Stoics, I came across this interesting discussion about Calvin and the Stoics.  He wrote a commentary on Senaca’s On Mercy (1532).  Sellars writes:

In his own preface, Calvin defends Senaca against both ancient and modern critics, proclaiming that ‘our Seneca was second only to Cicero, a vertiable pillar of Roman philosophy’ (Battles & Hugo, 11).  Having worked on the text so closely, Calvin was inevitably influenced by Seneca, whether positively or negatively, but the extent to which Seneca’s Stoicism contributed to Calvin’s later religious thought is much harder to determine.  Some have suggested that Stoic notions of determinism and an internal moral law helped to shape his religious outlook (Beck, 110), and others have gone so far as to suggest that ‘Calvinism is Stoicism baptized into Christianity’ (see Battles & Hugo, 46*), but no doubt the truth of the matter is somewhat more complex than this emphatic statement claims. p. 142

John Sellars, Stoicism (Bucks, UK: Acumen, 2006).
FL Battles & AM Hugo, Calvin’s Commentary on Seneca’s De Clementia (Leiden: Brill, 1969).
LW Beck, Early German Philosophy: Kant and his Predecessors (Cambridge, MA: Harvard, 1969).