Kitto's Popular Cyclopedia of Biblial Literature
Timothy, a young Christian of Derbe, grandson of Lois, and son of Eunice, a Jewess, by a Greek father, who was probably a proselyte (; ). He seems to have been brought up with great care in his family, and to have profited well by the example of the 'unfeigned faith' which dwelt in the excellent women named in; . The testimonials which Paul received in Lycaonia in favor of this young disciple, induced the apostle to make him the companion of his journeys and labors in preaching the Gospel (; ). He became his most faithful and attached colleague; and is frequently named by Paul with truly paternal tenderness and regard. Timothy appears to have been with the apostle at Rome, and to have been, like him, a prisoner there, though liberated before him (). His subsequent history is, however, unknown. It appears from , that when Paul went into Macedonia he left Timothy in charge of the church at Ephesus, and there are indications that he was still at Ephesus when the apostle was (as usually understood) a second time captive at Rome, and without hope of deliverance (). The tradition is, that Timothy retained the charge of the church at Ephesus till his death, and eventually suffered martyrdom in that city.
Kitto, John, ed. Entry for 'Timothy'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/t/timothy.html.