William Napier may refer to:

• William Ewart Napier (1881–1952), American chess master
• William Francis Patrick Napier (1785–1860), British soldier and military historian
• William Napier (astronomer) (born 1940), astronomer and author
• William Napier, 9th Lord Napier (1786–1834), Royal Navy officer, politician and diplomat
• William Napier (novelist), historical novelist pseudonym of Christopher Hart
• William Napier (VC) (1828–1908), English recipient of the Victoria Cross
• William Napier (Royal Navy officer) (1877–1951), British admiral
• William Craig Emilius Napier (1818–1903), British general
• William Napier (lawyer) (1804–1879), Singapore lawyer and newspaper editor; Lieutenant-Governor of Labuan
• William Joseph Napier (1857–1925), member of parliament for Auckland, New Zealand
• William Napier, 11th Lord Napier (1846–1913), British peer
• William Napier, 13th Lord Napier (1900–1954), Scottish soldier and courtier
• William Napier, 7th Lord Napier (1730–1775), Scottish peer
• Sir William Napier, 3rd Baronet (1867–1915), British baronet and soldier

• Bob Long (disambiguation)
• Bob Longenecker
• Bob longfield
• Bob Lopez
• Bob Lord (musician)
• Bob Lorenz
• Bob Lorimer
• Bob Losure
• Bob Loveless
• Bob Lucas Stadium
• Bob Ludwig
• Bob Luman
• Bob luman
• Bob Lunn
• Bob lurie
• Bob Lurie
• Bob Lurtsema
• Bob L. Wolke
• Bob Mable
• Bob Macguire
• Bob Mackie
• Bob MacKinnon
• Bob Maclennan
• Bob MacLeod
• Bob MacMillan