Srinivasa Ramanujan (1887 – 1920) is the eponym of all of the topics listed below.
Brocard–Ramanujan Diophantine equation
Dougall–Ramanujan identity
Hardy–Ramanujan Journal
Hardy–Ramanujan number
Journal of the Ramanujan Mathematical Society
Landau–Ramanujan constant
Ramanujan's congruences
Ramanujan Institute for Advanced Study in Mathematics
Ramanujan–Nagell equation
Ramanujan–Peterssen conjecture
Ramanujan–Skolem theorem
Ramanujan–Soldner constant
Ramanujan summation
Ramanujan theta function
Ramanujan graph
Ramanujan Journal
Ramanujan's tau function
Ramanujan's ternary quadratic form
Ramanujan Mathematical Society
Ramanujan prime
Ramanujan's constant
Ramanujan's lost notebook
Ramanujan's sum
Rogers–Ramanujan identity
SASTRA Ramanujan Prize
Srinivasa Ramanujan Centre
Srinivasa Ramanujan Medal
Ramanujan magic square
Srinivasa Ramanujan Institute of Technology