From Wiktionary, the free dictionary
Probably from Ancient Greek Ο (W) (digamma) in a late form such as 
, 
; or from Ο (Q) (koppa), given its similarity to a truncated π (90).
π΅ β’ (q)
- The sixth letter of the Gothic alphabet, representing /kΚ·/, with a numerical value of 6.
- (Gothic script letters) π° (a), π± (b), π² (g), π³ (d), π΄ (Δ), π΅ (q), πΆ (z), π· (h), πΈ (ΓΎ), πΉ (i), πΊ (k), π» (l), πΌ (m), π½ (n), πΎ (j), πΏ (u), π (p), π (90), π (r), π (s), π (t), π
(w), π (f), π (x), π (Ζ), π (Ε), π (900)
, 
; or from Ο (Q) (koppa), given its similarity to a truncated π (90).