Syriac alphabet
In the Syriac alphabet, the sixth letter is ܘ. Waw (ܘܐܘ) is pronounced [w]. When it is used as a mater lectionis, a waw with a dot "above" the letter is pronounced [o], and a waw with a dot under the letter is pronounced [u]. Waw has an alphabetic-numeral value of 6.