Egyptian hand		Phoenician kaph		Greek kappa	Κ (κ)
Kaph is thought to have been derived from a pictogram of a hand (in both modern Arabic and modern Hebrew, kaph means palm/grip) ... ... The manik, with the tzab, or serpent's rattles as prefix, runs across Madrid tz. 22 , the figures in the pictures all holding the rattle; it runs across the hunting scenes of Madrid tz. 61, 62, and finally appears in all four clauses of tz. 175, the so-called 'baptism' tzolkin. It seems impossible, with all this, to avoid assigning the value of grasping or receiving. But in the final confirmation, we have the direct evidence of the signs for East and West. For the East we have the glyph Ahau-Kin, the Lord Sun, the Lord of Day; for the West we have Manik-Kin, exactly corresponding to the term Chikin, the biting or eating of the Sun, seizing it in the mouth.    The pictures (from Gates) show east, north, west, and south; respectively (the lower two glyphs)  'Lord' (Ahau) and 'grasp' (Manik). Manik was the 7th day sign of the 20 and Ahau the last ...

I feel inclined to improve my earlier description of Greek sigma:

It should here also be added that γ Ceti has a name which could connect Gb4-20 with Gb4-29 (at κ Ceti):

... Al Kaff al Jidmah is the Arabs' name for the whole group marking the Whale's head, but in modern lists is exclusively applied to this star ... The Arabian astronomers of course knew the Greek constellations and called it [Cetus] Al Ketus, from which have come Elketos, Elkaitos, and Elkaitus; but their predecessors, who had not heard of the Royal Family and its foe, separated these stars into three very different asterisms. Those in the head, α, γ, δ, λ, μ, ξ¹and ξ² , were Al Kaff al Jidmah, the Part of a Hand, from a fancied resemblance to their Stained Hand, our Cassiopeia ...

... The Arabians called it Al Dhāt al Kursiyy, the Lady in the Chair - Chilmead's Dhath Alcursi, - the Greek proper name having no significance to them; but the early Arabs had a very different figure here, in no way connected with the Lady as generally is supposed, - their Kaff al Hadib, the large Hand [cfr Caph] Stained with Henna, the bright stars marking the fingertips; although in this they included the nebulous group in the left hand of Perseus. Chrysococca gave it thus in the Low Greek Χείρ βεβαμένη; and it sometimes was the Hand of, i.e. next to, the Pleiades, while Smyth said that in Arabia it even bore the title of that group, Al Thurayya, from its comparatively condensed figure ...