In the Ogham alphabet, Beth is the Self.
consonant B : Beth : [BLN] number five (5) in Irish counts; the first letter of BLN and BLF alphabets.  The leading consonant B was linked to the Queen of the Pentad, otherwise called the Mother of the mother sounds, the vowel U of Midsummer, which stands for the null value (0) in Irish counts.  Cf. Buana the Goddess.