Query on parents of Charlotte BISHOP

Charlotte Crabb - Shrimpton - Pentley - Allsop is on Geni with
* born 1791 Norfolk Island
* died 1851
married 18/3/1811 to James Crabb [Marine 1810]
* 1813 Alexander W Shrimpton
* 1814 Mary Jane Shrimpton - Norris
married 9/8/1819 to Richard Shrimpton [Convict "Scarborough" 1790]
* 1819 Edward Francis Shrimpton
* 1820 Charles K Shrimpton
* 1824 Leah Elizabeth Jane Mahoney
* 1826 Richard Shrimpton, II
married 1828 to John Pentley [Convict "Atlas" 1819]
* 1829 Susannah Jane Chillingworth
commonlaw relationship 1832 to Frederick Allsop
* 1833 Margaret Elizabeth E Madden

3 sets of parents have been put forward for Charlotte
* born 1791 as Charlotte DAVIS or DAY on Norfolk Island to Mary (Davis) Day - Bishop [Convict "Lady Penrhyn" 1788] and Samuel Day, Convict "Alexander" 1788 - changed name to Charlotte BISHOP
* born 1791 as Charlotte DAVIS or BISHOP on Norfolk Island to Mary (Davis) Day - Bishop [Convict "Lady Penrhyn" 1788] and Thomas Bishop, Marine - changed name to Charlotte BISHOP
* born 1792 as Mary DAVIS on Norfolk Island to William Philip Davis, Convict “Scarborough” 1790 and Jane (Reid) Davis, Convict "Lady Juliana" 1790 - adopted and changed name to Charlotte BISHOP

I have detached these parents and added {unknown father of Charlotte Bishop} and {unknown mother of Charlotte Bishop} until supporting evidence can be located to definitively connect her.