The 1906 and 1911 census should reflect the names in the 1901 census.  The Swehun name is confirmed by the obituary of Jon Swherun who lists Andrew as his father.
Tazka (also called Tacia) was head of the household because her husband Kost Swerhun drowned shortly after arrival.  Andrew is listed as a child.
http://automatedgenealogy.com/census/Su ... name&Go=GoSurname	Givens	Age	Province	District	Subdistrict	Enum.
District	Page	Line
Swerhun	Andrew	9	TT	ASSINIBOIA (East/Est)	McNutt	k(2)	1
22
Swerhun	Mary	2	TT	ASSINIBOIA (East/Est)	McNutt	k(2)	1
24
Swerhun	Stephen	4	TT	ASSINIBOIA (East/Est)	McNutt	k(2)	1
23
Swerhun	Tazka	30	TT	ASSINIBOIA (East/Est)	McNutt	k(2)	1
21
http://automatedgenealogy.com/census06/index.htmlSurname	Givens	Age	Province	District	Subdistrict
Number	Page	Line
swirhun	Andrew	15	SK	Mackenzie	01	12
24
swirhun	Maria	8	SK	Mackenzie	01	12
26
swirhun	Stefon	10	SK	Mackenzie	01	12
25
swirhun	Tacka	35	SK	Mackenzie	01	12
23
http://automatedgenealogy.com/census11/ ... skatchewanSurname	Givens	Age	Province	District	Subdistrict	Enumeration
District #	Page	Line
Swzohum	Andrew	20	Saskatchewan	Mackenzie	Townships 25	1	4
42
Swzohum	Erinra	3	Saskatchewan	Mackenzie	Townships 25	1	4
45
Swzohum	Mary	12	Saskatchewan	Mackenzie	Townships 25	1	4
44
Swzohum	Nasta	4/12	Saskatchewan	Mackenzie	Townships 25	1	4
46
Swzohum	Stepon	15	Saskatchewan	Mackenzie	Townships 25	1	4
43
Swzohum	Tucka	40	Saskatchewan	Mackenzie	Townships 25	1	4
41
http://www.rootsweb.ancestry.com/~cansa ... its.html#SSWERHUN - John Swerhun, beloved husband of Lena entered eternal rest on Friday, March 28, 2008 at the Yorkton & District Nursing Home. He was 82 years of age. John was born on October 3, 1925 at Calder, SK, the son of Andrew and Anastasia (flee Kotiw) Swerhun, He is survived by his wife of 41 years, Lena; step-children Marlene Mathers of Vernon, BC, Dan Yasinski (Betty) Lake, MB, William (Lorraine) Yasinski of Winnipeg, MB; eight grandchildren and five great-grandchildren; sister Kathleen Hway of Schumacher, ON; brother Peter (Sonia) Swerhun of Calder; sister-in-law Ann Swerhun of Yorkton; as well as numerous nieces and nephews. Predeceased by his parents; grandson Bart Kilback; daughter-in-law Elsie Yasinski; son-in-law Irvin Kilback; four sisters Mary Harand, Doris Bartellelo, Anne & Violet Swerhun and by three brothers Mike, Harry and Bill Swerhun. The Funeral Service was held on Tuesday, April 1, 2008 at Yorkton Memorial Gardens Family Centre with Faye L. Greer of Westview United Church officiating. Taped selections for the service were 'Amazing Grace' and 'When The Roll is Called Up Yonder'. The eulogy was conveyed by Bill Hway. The interment followed in the Garden of Devotion at Yorkton Memorial Gardens with Bob Swerhun, David Swerhun, Bill Hway, Ryan Yasinski, William Eftoda and Peter Horaska serving as casket bearers.
http://wc.rootsweb.ancestry.com/cgi-bin ... &id=I20812•  ID: I20812 
•  Name: Kost Swerhun 
•  Sex: M 
•  Birth: in Husák, Slovakia, Austria-Hungary 
•  Emigration: 1897 Saskatchewan, Canada 
•  Death: drowned in the Assiniboia River ABT 1905 in Calder, Saskatchewan, Canada 
•  Note: • Shortly after settling on their homestead in Calder, Sask., tragedy struck; Kost accidentally drowned in the Assiniboine River. Kost had not yet built a poper house for his family and they were living in the side of a hill at the time of his demise. Tacia, now a young widow with five children, was in dire straights and happy to accept Demetro Olineck's offer to exchange her quarter section with one of his quarter sections that already had a house on it.