A surname is usually capitalized on the first letter, except where it has a leading de or d' indicating a nobility name, where the first letter afterward is capitalized.
Someones last name.
You spell his last name as BLEU.
The last name is spelled "Gadbury."
You unusually use an the abbreviation Sr. For example: John James, Sr.
disposition.
The last name "Hennessy" is spelled as such.
JFK's last name is spelled Kennedy.
Niall from One Direction's last name is Horan.
Presley.
Lavigne
Tomlinson
Obama.