2Tim. 1.5
Contining the "I thank God"... from vs. 3.
Unfeigned = unhypotcritical, genuine, sincere, un-pretended.
Acts 16:1 Luke didn't mention the family names, perhaps Paul knew the family better than Luke. He seems to know the family on a personal basis, perhaps from a time even before their conversion.
Eunice = while her name is Greek, she was a Jewess.
This faith first dwelled in his grandmother and mother before it came to dwell in him. Timothy was a third generation Christian.
ASV "Having been reminde" .. No record of what it was that reminded Paul, perhaps a personal letter or a visit from one who knew Timothy.