of Hebrew origin (H7975); Siloam (i.e. Shiloach), a pool of Jerusalem:--Siloam.
Siloam = "sent"
the Pool of Siloam, a fountain of water in Jerusalem, also called Shiloah in Isa. 8:
the Tower of Siloam, may have been a tower near or over the Pool of Siloam, which fell down killing 18 men; very likely they were purifying themselves. (Gill)