Mac William. Used as a synonym for Mac Quillan, which see, in Co. Down in the south - east of the Ulster Province.

Fitz William. English Viscount in Co. Dublin in the north - east of Southern Leinster who were at Merrion south of Dublin Bay were they had their Castle and are now in the south - east of the Leinster Province.

Mac William or Mac Williams. Highland Scottish origins from the Clan Mac Farlane - Gaelic / Mheic Uilliam who were in the north of the Ulster Province. (Not connected to Fitz William).

Williams. Welsh origins. In all Provinces and not used by any of the Irish Septs to anglicize their names.

Williamson. Scottish origins in the Ulster Province.

Willis -

Willmore. Gaelicized as Mheic Liammoir they were in Co. Tyrone in Central Southern Ulster in the 16th Century AD.

Willoughby -

Wilmott  or Wilmot. English origins in Ireland since the end of the 16th Century AD with a branch in Co. Kerry in the south - west of Southern Munster in 1614 AD.

Wilson or Willson. English origins in the Ulster Province.

Wims. See Weymes.

Windle (wind hill) English locative origins in Co. Limerick in the mid - north - west of the Munster Province in the second half of the 17th Century AD and were known as Wingle in the Glin area there. Winkle was also used as a variant in the south of Co. Galway in Southern Connacht.

Windsor -

Mac Winey. Used as a variant for Mac Weeney, which see, in Co. Leitrim in Northern Connacht.

Wingfield or Wingfeild. James 1st the Stuart English King granted them the Vale of Glendalough and the Sugar Loaf Mountains, Enniskerry and Dargle near Bray. Lord Powerscourt / Sir Richard Wingfield had 26,000 acres originally that was firstly confiscated rom the Irish Septs there after the Anglo - Norman Invasion by de La Poer / Power who was with Strongbow. It was then retaken back for the Irish by the "ferocious" Heremonian Ui Laoghaire Cu Corb Ui Dunlainge O Byrnes and O Tooles in Henry VIII's reign until once again confiscated by the English and given to the Talbots until 1608 AD when it was then given by James 1st to Sir Richard Wingfield who was created the English Lord Powerscourt in 1618 AD.

Winkle.  See Windle.

Winston. English origins in Co. Waterford in the south - east of the Munster Province in 1573 AD with one member being the Sheriff of Waterford there and 2 members were Attainted (Off with their Heads) for supporting James 11 the Stuart English Catholic King. Now mainly found in Co. Dublin in the north - east of Southern Leinster.

Winston. They were in Co. Roscommon in the east of the Connacht Province.

Winter. They had their Estates in Co. Meath in Northern Leinster.

Winters or Winter. English name used as a synonym in Co. Tyrone in Central Ulster for Mac Alivery, which see - Irish / Mheic Giolla Gheimhridh (Winter).

Winthrop -

Wisdom. English name used for O Kealy, which see Irish / Ua Ceile in Co. Louth in the north - east of Northern Leinster.

Wise. See Wyse.

Wiseman. English origins in Co. Cork in Southern Munster since the 16th Century.

Wises. Anglo Norman origin in Southern Leinster.

Witham -

Wixted or Wickstead. English toponymic origins in Co. Offaly in the north - west of Southern Leinster and nearby in Co. Tipperary in the north - east of the Munster Province since the Mid - 17th Century AD.

Wodenham -

Wodfell -

Woffington. English toponymic origins in Co. Dublin in the north - east of Southern Leinster.

Wogan  / Ugan. Welsh / Gwgan / gwg (frown) who were in Ireland in 1295 AD with their ruined Rathcoffey Castle at Straffan in Co. Kildare in Central Southern Leinster. Sir Charles Wogan was a supporter of James 11 the Stuart English Catholic King, and a friend of his son, James III the Old Pretender, and he served in "Dillon's Regiment" of the Irish Brigade among the "Wild Geese."

Wolf or Wolfe. Used to anglicize their name by the O Mictyre who were the Chiefs of Imokilly / Ui Mheic Caille in Co. Cork.

Wolverston -