Are you assuming that Thomas JASPERS was born with a different name ?
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I see there are 9x children born to Thomas & Emily:

1876 Jaspers Joseph Thomas
1877 Jaspers William Henry
1879 Jaspers Sarah Ann
1881 Jaspers George Frederick
1884 Jaspers Thomas James
1886 Jaspers Albert Aron
1888 Jaspers Herbert Edward
1890 Jaspers Percival
1894 Jaspers Leo
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NZ Probates

Name: JASPERS Thomas
Place: Northcote
Death Date: 26 May 1915
Court: Auckland
Archives Reference: BBAE 1569 10201/15
Probate Number: 10201/15
Filed Date: 3 Sep 1915
Type: Will
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NZ Probates

Name: JASPERS Joseph Thomas
Place: Nelson
Occupation: Truckdriver
Court: Wellington
Archives Reference: AAOM 6030 9154
Probate Number: 9154
Filed Date: 1 Apr 1943
Type: Intestate (Letters of Administration)
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