5 occurrences in 5 dictionaries
Reference: Saph
Easton
extension, the son of the giant whom Sibbechai slew (2Sa 21:18); called also Sippai (1Ch 20:4).
Fausets
Of the sons of the giant; slain by Sibbechai the Hushathite fighting with the Philistines at Gob or Gaza (2Sa 21:18). In 1Ch 20:4 SIPPAI.
Hastings
One of four Philistine champions slain by David's heroes (2Sa 21:18; 1Ch 20:4 [Sippai]).