1) These are possible spellings of the bird we call the ‘nuthatch’ and they occur in several by-names.
1359 Walter Nuthak, Dale
1387 John Nuthagg, Hawnby
1389-90 Walter Notehagg, East Heslerton. If that is not the meaning it should be noted that similar by-names and place-names are found in other parts of Yorkshire where they probably refer to small hazel woods: 1274 William de Nuteschawe, Sowerby
1379 John Nuttehirst, Saddleworth
n.d. terram suam de Noteherst.