Hi Jade,Sarah's parents were Thomas (1786-1865) & Hannah Ann (?1786-1859) Whyberd.Hannah's maiden name may possibly have been Whyberd and if this is the case then she and Thomas were cousins and both from Albury,Hertforsdhire.
Her grandparents were John (1755-1840) and Sarah (b ?-1791) Whyberd (nee Smith)
Her great grandparents were Richard Wybard/Whybird and Ann (nee Clark) who were married in 1749 at Furneaux Pelham,Hertfordshire.
Sarah's siblings were
Thomas b 1809,married 1833 Rebecca Holland
John ( 1811-1880), married 1834 Sarah Ann Appleford. (My gt,gt,gt grandparents)
Lichfield (1813-1853) ,married Elizabeth Fensom
Susannah b 1818; married 1845 Thomas John Curd
Daniel b 1820,married 1) 1844 Susannah Say 2) 1850 Ellen Nevel (nee Cocking)
James (1823-1842)
Hannah b1826,married 1847 Thomas Murray
Alfred b 1827,married 1848 Ann Elizabeth Murray Morris (*)
Many of the later Whyberd's who settled in London were barge builders and shipwrights.As far as I know all the Whyberd's/Whybirds are related.There are many variants of the name which can make them hard to track down.
I hope this information helps.I have a large Whyberd family tree and am happy to share what information I have if you want to get in touch.Best wishes.Jane (Whyberd)
(*) Moderator comment: Surname amended