Fausset's Bible Dictionary
A Christian at Rome (Romans 16:15). The addition, "and all the saints which are with them," implies that each of the five, of whom Olympas is one, was a center round whom others gathered for prayer, edification, and good works.
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Fausset, Andrew R. Entry for 'Olympas'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/o/olympas.html. 1949.