contemporary (n.)
"one who lives at the same time as another," 1630s, originally cotemporary, from co- + temporary; modified by influence of contemporary (adj.). Replacing native time-fellow (1570s).
contemporary (adj.)
1630s, from Medieval Latin contemporarius, from Latin com "with, together" (see com-) + temporarius "of time," from tempus "time, season, portion of time" (see temporal (adj.)). Meaning "modern, characteristic of the present" is from 1866.