Trophimus
Trophimus is named once in the surviving epistolary record. He is a companion of Paul whose work with the apostle ends with illness on the road, and the line that reports it does so in passing, alongside another companion's whereabouts.
Left at Miletus Sick
Paul mentions Trophimus in a sequence of personal updates near the end of 2 Timothy:
"Erastus stayed at Corinth: but Trophimus I left at Miletus sick" (2Ti 4:20).
Two of Paul's associates, two locations, two reasons for absence. Erastus stays in Corinth; Trophimus is left at Miletus because he is ill. The line gives no further detail — no recovery, no instruction, no later word — but it preserves Trophimus in the record as one whose journey with Paul was interrupted by sickness, and whose name Paul still keeps in mind when writing to Timothy from prison.