EDIT A character devised especially for the Esperanto language. The character always represents the ch sound as found in the English word loch.

 WJGO 

EDIT Position of the diacritical While the most frequent position of the diacritical is placed above the X-height and centered on the letter body, it is not unusual to see it centered on the shaft of the "h", or placed just above the curve, at x-hight, sometimes even touching the stem.

 tuvalkin  tuvalkin