I don't know , their names were- James Bunn and Susannah Bunn.They were staying with them at the time of the census in Birmingham warwickshire
I hope his name is Thomas & not James Bunn
1841 shows a Thomas , Susannah & John Bunn in the same household as David & Caroline Adams
I don't have any evidence but as
Thomas & Susannah Bunn named their first child
John I wonder if her maiden name may be ADAMS and therefore sister to David - only speculation at this stage further investigation would be needed
for info. in case they are related looking at the 1841c this looks a possibility for Susannah Bunn & her son John on later censuses
1861 RG 9; Piece: 2171; Folio: 106; Page: 28
John Bunn 28 dittoed as born Birmingham Iron Castor
Harriett 30
James 7
Emma 4 Birmingham
Henry 2
Hannah Bunn widow
mother 50 House duties West Brom
1871c RG10; Piece: 3136; Folio: 146; Page: 20
John BUNN 39 (1832) Birmingham Iron Bedstaed Castor
Harriet 40 Aston
James 17
Emma 14
John 10
Henry 7
Susanna BUNN Widow
Mother 60 (1811) Wednesbury
1881 RG11; Piece: 3026; Folio: 113; Page: 8
John BUNN Widow 49 Birmingham Warwickshire Iron Bedstead Worker
John son 20
Henry son 18
SUSANNAH widow
grandmother 70 (1811)W’bury Staffordshire
Emma Bunn Aunt 56 W’bury Staffs