Hi Mary,
Those Andreas entries could have been entered in the register as late as after one of the parents died, as Frances said. They are very hard to find unless you are indexing the whole register, as the LDS were.
Re. your William Kerruish possibilities, I see I have looked at No.2 before, with info from Philip Allen, the Joughin researcher, after someone (off board) asked about a connection.
They were William Kerruish, Ballellin (1753-1841) and Anne Joughin, Rhenabb (1759-1838). I believe they are on one of Constance Radcliffe's hand-written Kerruish trees at the MM.
The Ballellin tree gives son William 1787-1860 married Sarah Corteen 1782-1862, with children bapt Maughold 1818-1826.
William & Ann's eldest daughter Catherine 1782-1861 married William Kerruish 1780-1864 of Booilevelt (chart also in the MM).
Booilevelt in censuses: (thanks to Tom Corteen)
In 1841 census:
2 19 101 Bhullevelt
William KERRUISH 60 Farmer Isle of Man
Catharine KERRUISH 60 Isle of Man
Robert KERRUISH 19 Ag lab Isle of Man
William KERRUISH 23 Ag lab Isle of Man
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Robert KERRUISH 70 Ag lab Isle of Man
Isabella JOUGHIN 19 FS Isle of Man
Margaret CALLOW 9 Isle of Man
John MARTIN 29 Ag lab Ireland
=========
2 20 102 Bhullevelt
Thomas KNEALE 43 Ag lab Isle of Man
Catharine KNEALE 40 Isle of Man
Catharine KNEALE 10 Isle of Man
William KNEALE 8 Isle of Man
James KNEALE 5 Isle of Man
Margaret KNEALE 4 Isle of Man
Mary KNEALE 2 Isle of Man
===========
2 20 103 Bhullevelt
John LORD 30 Ag lab Isle of Man
Catharine LORD 30 Isle of Man
Thomas LORD 6 Isle of Man
John LORD 3 Isle of Man
Robert LORD 3 m Isle of Man
==========
2 20 104 Bhullevelt
John KERRUISH 40 Farmer Isle of Man
Catharine KERRUISH 32 Isle of Man
Mary KERRUISH 5 Isle of Man
William KERRUISH 3 Isle of Man
----------------
Robert KNEALE 20 MS Isle of Man
In 1861 census:
2 77 Bwooilvelt
John KERRUISH Head MAR 61 Farmer of 60 acres Maughold
Cath KERRUISH Wife MAR 63 Maughold
Mary KERRUISH Daughter UNM 24 Maughold
Margaret KERRUISH Daughter UNM 19 Maughold
John KERRUISH Son 15 Maughold
Robert KERRUISH Son 12 Scholar Maughold
John Kerruish of Bwooilvelt d.1877 married Catherine Looney Maughold 20 Jan 1835.
These Kerruish families also appear in the Radcliffes' Maughold book.
Sue