The corpus record
bidiaioi · οἱ
officers, overseers
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βιδιαῖοι · bidiaioi — LSJ
officers at Sparta, whose duties were connected with the charge of the ephebi, five in number, acc. to Paus. 3.11.2; but six in Inscrr.:—written βίδεοι IG 5(1).32 B, al., βίδυοι ib. 41: sg. βίδυιος ib. 1498.13 (Messenia, ii B. C.). (For ϝίδυιοι, i.e. overseers.)
No etymology authority pointer is recorded for this lemma yet — an honest gap, not an omission. The etymological dictionaries (Beekes, Chantraine, Frisk) are matched incrementally.