Etymology From Middle English sammen, samnen, from Old English samnian, ġesamnian (“to collect, assemble, bring together, gather, join, unite, compose, meet, glean”), from Proto-West Germanic *samnōn, from Proto-Germanic *samnōną (“to gather”), from Proto-Indo-European *sem- (“one”). Cognate with Dutch zamelen (“to collect”), German sammeln (“to collect, gather”), Swedish samla (“to gather, collect”), Icelandic samna (“to gather, collect”). More at same.
Etymology From Middle English sām (“together”), from Old English samen (“together”), from Proto-West Germanic *saman, from Proto-Germanic *samanai (“together”), from Proto-Indo-European *sem- (“together, one”).
Now are they saints all in that city sam.1590, Edmund Spenser, “(please specify the book)”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, →OCLC:
All Sam the souldiers then replied.a. 1600, The Battle of Floddon Field:
sam
adj
Etymology From Middle English sam- (prefix), from Old English sam-, from Proto-Germanic *sēmi- (“half”), from Proto-Indo-European *sēmi- (“half”). Related to semi- (via Latin).