Evans, Lewis, FRS (1755-1827), mathematician, mathematics teacher, astronomer, orginally from Caerleon.
Griffith, John, Rev. (1860-?), amateur astronomer and early investigator into megalithic astronomy, Abergavenny.
Jones, Kenneth Glyn (1915-1995), amateur astronomer and deep sky observer, originated from New Tredegar.
Lewis of Caerleon (mid 15th century – end 15th / early 16th century), astronomer, mathematician, physician, theologian, probably from
Lowe, Edward Joseph (1825-1900), amateur astronomer, lived near Chepstow in later life, moving from Nottingham (see Nottinghamshire).
Owen, Edwin Vaughan (1870-1950), amateur observer, younger brother of O. J. Owen, Abergavenny.
Owen, Owen John , OBE (1867-1960), amateur observer, Abergavenny.
Jenkins, Taliesyn Kenwin (b. 1879), amateur observers, author of popular articles, Nantyglo/Blaina.