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.
You unusually use an the abbreviation Sr. For example: John James, Sr.
disposition.
Niall from One Direction's last name is Horan.
JFK's last name is spelled Kennedy.
The last name "Hennessy" is spelled as such.
Obama.
Tomlinson
Presley.
MALIK
Lavigne