As to the first element in these fiele names, it is more likely to derive from the Anglo-Saxon 'holh' meaning a hollow, or dip in the land. The other possibility is that your names derive from 'hulu' which means huts or cabins (this is the word from which our modern word 'hovel' derives. The Wirral, as I'm sure you know, has a rich tapestry of place names, with frequent Scandinavian elements and quite a number of Celtic ones too. It is not impossible that parts of the names you are interested in predate the AS period. In Celtic place names 'hel' can mean a road or track, and 'hal' salt. Hope this helps Ian