Of uncertain origin; Lois, a Christian woman -- Lois.
Thayer's Greek Lexicon
Strong's 3090: Λωΐς
Λωΐς (WH Λωΐς), Λωισιδος, ἡ, Lois, a Christian matron, the grandmother of Timothy: 2 Timothy 1:5.
Englishman's Concordance (References)
Strong's Greek: 3090. Λωΐς (Lóis) — 1 Occurrence
2 Timothy 1:5 - N-DMS GRK:μάμμῃ σου Λωίδι καὶ τῇ NAS: in your grandmother Lois and your mother KJV: thy grandmother Lois, and thy INT: grandmother of you Lois and in the