Quote Originally Posted by The Q View Post
Also the Scottish name of Menzies is or should be pronounced ( approximately) Mengis, this is from the disappearance of a letter for the old NG sound and the nearest in shape to the old letter was a Z. Sadly even in Scotland I often hear: Men-zees
The yogh.

The Anglicised Mackenzie had originally been pronounced "Mackaingye" – with a modern English Y sound represented with the letter yogh ȝ. In the 18th century it became popular to write and pronounce the name with what is the equivalent of a modern English Z sound, because of the similarity of the letter yogh and letter Z. There are Lowland Scots words and Scottish names that have been affected in a similar way (example: the surname Menzies).

http://www.scottishhandwriting.com/cmLFyo.asp