Dathai,
I am going to add more confusion.
I have included census records- Census Ireland 1901. In the townland of Rathmacknee little DED Killinick & Co Wexford you will find William (b. c.1847) & Margaret Whelan and 6 of their children.
Residents of a house 5 in Rathmacknee Little (Killinick, Wexford) 1901
Whelan William 54 Male Head of Family Catholic Co Wexford Gardner Married
Whelan Margaret 55 Female Wife Catholic Co Wexford - Married
Whelan James 18 Male Son Catholic Co Wexford Labour Not Married
Whelan Myles 16 Male Son Catholic Co Wexford Labour Not Married
Whelan Mary E 14 Female Daughter Catholic Co Wexford Scholar Not Married
Whelan Susan 12 Female Daughter Catholic Co Wexford Scholar Not Married
Whelan John 10 Male Son Catholic Co Wexford Scholar Not Married
Whelan Peter 27 Male Son Catholic Co Wexford Labour Not Married
Their son William (b. c. 1870) at 1901 can be found in the townland of Butlerstown Co Wexford with his wife Bridget and children Gertrude, William & Margaret Mary.
William is working as a coachman.
Residents of a house 3 in Butlerstown (Tomhaggard, Wexford)1901
Whelan William 31 Male Head of Family Roman Catholic Co Wexford Coachman
Whelan Bridget 29 Female Wife Roman Catholic Co Wexford -
Whelan Gertrude 4 Female Daughter Roman Catholic Co Wexford -
Whelan William 2 Male Son Roman Catholic Co Wexford -
Whelan Mary Female Daughter Roman Catholic
The 1911 census show William born 1847 working at Butlerstown as a gardener
Residents of a house 2 in Butlerstown (Tomhaggard, Wexford) 1911
Whelan William 63 Male Head of Family Roman Catholic Co Wexford Gardener - Married
Cleary Michael 40 Male Lodger Roman Catholic Co Wexford Agricultural Labourer
His wife Margaret is at Ballynaas with Myles Peter & John
Residents of a house 1 in Ballynaas, Great (Mayglass, Wexford) 1911
Whelan Margaret 63 Female Head of Family Roman Catholic Co Wexford House Keeper Married 43 11 9
Whelan Peter 37 Male Son Roman Catholic Co Wexford Agricultural Labourer Single - - -
Whelan Myles 26 Male Son Roman Catholic Co Wexford Agricultural Labourer Single - - -
Whelan John 19 Male Son Roman Catholic Co Wexford Agricultural Labourer Single - - -
The 1911 census show William’s (born 1870) wife Bridget & Gertrude age 14 William age 12 & Margaret age 10 in a house in Maudlintown, Wexford town
Residents of a house 8 in Maudlintown, part of (Rural) (Wexford Rural, Wexford) 1911
Whelan Bridget 36 Female Wife Roman Catholic Co Wexford - Married 15 3 3
Whelan Gertrude 14 Female Daughter Roman Catholic Co Wexford Scholar - - - -
Whelan William 12 Male Son Roman Catholic Co Wexford Scholar - - - -
Whelan Margaret 10 Female Daughter Roman Catholic Co Wexford Scholar
NoteMargaret Mary is at times referred to as Margaret and other times as Mary.
Butlerstown house was an estate house with about 2000 acres at the time
Residents of a house 7 in Custom House Quay (Wexford Urban No 1, Wexford)1911
Fetherstonhaugh Richard 55 Male Head of Family Church of Ireland Co Wexford Bark Agurt Read and write Married 16 - -
Fetherstonhaugh Carolina Alice 41 Female Wife Church of Ireland England - Read and write Married 16 2 2
Fetherstonhaugh William Thomas 15 Female Daughter Church of Ireland Co Mayo Scholar Read and write Single - - -
Fetherstonhaugh Cuthbert John 8 Male Son Church of Ireland Co Wexford Scholar Read and write Single - - -
Whelan William 40 Male Servant Roman Catholic Co Wexford Man Servant Read and write Married - - -
Collons Catherine C 37 Female Servant Roman Catholic Co Wexford General Servant Read and write Single - - -
I understand from relations that William b 1870 suffered ill health while a coachman as a result of being out in all weathers.
I have had a look at my notes. I did check the church records for the marriage of William Whelan & Bridget Fenlon Orristown Wexford on 18/10/1896. His father was William Whelan Rathmacknee.
Orristown- Rathmacknee-Church- all within a mile. The apple fell close to the tree.
I am sorry if this adds more confusion but you do need total confusion to solve your dilemma.
I will pick up a birth cert for one of the children and it will confirm mother’s name.