I once found out that my ancestor George Musgrave was born in Evenwood, Durham in 1856. I looked on the 1881 census on FamilySearch (this was before all other censuses were released) and found George Musgrave, he was married by then, but I then found a Henry Musgrave born c1858 in Evenwood still living with parents Henry and Elizabeth so assumed they were George's by name and birthplace. But when more censuses came online I found George was the son of Thomas and Ann.
A few times I have climbed (direct ancestor wise) the wrong tree but found the tree was extended family.
LONDON, Coombs, Roberts, Auber, Helsdon, Fradine, Morin, Goodacre
DORSET Coombs, Munday
NORFOLK Helsdon, Riches, Harbord, Palding
KENT Roberts, Goodacre
SUSSEX Walder, Boniface, Dinnage, Standen, Lee, Botten, Wickham, Jupp
SUFFOLK Titshall, Frost, Fairweather, Mayhew, Archer, Eade, Scarfe
DURHAM Stewart, Musgrave, Wilson, Forster
SCOTLAND Stewart in Selkirk
USA Musgrave, Saix
ESSEX Cornwell, Stock, Quilter, Lawrence, Whale, Clift
OXON Edgington, Smith, Inkpen, Snell, Batten, Brain