Strong's G5569 — ψευδάδελφος (noun)
pseudadelphos (psyoo-dad'-el-fos) n.
1. a false brother, i.e. pretended associate
[from G5571 and G80]
KJV: false brethren 
Root(s): G5571, G80 
Hebrew root: ἀδελφός
Occurrences: 2