ep·i·gone 
(ĕpĭ-gōn′)
(ĕpĭ-gōn′)n.
A second-rate imitator or follower, especially of an artist or a philosopher.
[French épigone, sing. of épigones, from Greek Epigonoi, sons of the seven heroes against Thebes, from pl. of epigonos, born after : epi-, epi- + gonos, child, seed; see genə- in the Appendix of Indo-European roots.]
ep′i·gonic (-gŏnĭk) adj.
e·pigon·ism (ĭ-pĭgə-nĭz′əm) n.