Evans, John Silas [Canon] (1864-1953), amateur astronomer and author, studied in Lampeter, later in life retired to Aberystwyth (Jones 2014, 79-80).
Evans; Thomas Luther, [Capt.] (1852-1929), amateur astronomer, born Aberaeron.
Griffith, John [Revd.] (1860-?), amateur astronomer and early investigator into megalithic astronomy, born Ponterwyd (Jones 2014, 79).
Jenkins, Griffith Parry (1860-1940), amateur observer, popular lecturer, originated from Llancynfelin: later emigrated to Canada (Jones 2014, 72).
Jones, Evan Lewis (1876-?), popular lecturer, born Aberaeron.
Jones, Rhishard Llewelyn (1865-1932), Deputy Director of Kodaikanal and Madras Observatories, India, born in Uchaf-Talybont (Jones 2014, 78).
Owen, Gwilym [Prof.] (1880-1940), professor of physics at Aberystwyth (Jones 2014, 82).
Owen, John Richard (?-c.1977), of Llanrhystud, amateur astronomer, observer, popular lecturer, took possession of Pontllyfni meteorite (Jones 2014, 80).