Lydia Mackenzie Falconer Miller
Lydia Mackenzie Falconer Miller or Harriet Myrtle( 1812 – 11 March 1876) was a Scottish children's writer.
Dmitri Varfolomeyev (footballer, born 1978)
Dmitri Nikolayevich Varfolomeyev( born 15 March 1978 in Leningrad) is a former Russian football player.
He is a younger brother of Sergei Varfolomeyev.
Harriet Finlay-Johnson
Harriet Finlay- Johnson or Harriet Johnson or Harriet Weller( 12 March 1871 – 1956) was a British educationalist and schoolteacher known for encouraging children to create dramas to improve their education.
Caroline Hamilton Pier
Caroline Hamilton Pier (September 18, 1870 - April 28, 1938) was an American lawyer.
Ferdinand Begg
Ferdinand Faithfull Begg FRSE( middle name sometimes spelt Faithful; 27 December 1847 in Edinburgh – 4 December 1926 in Hove, Sussex) was a Scottish stockbroker and Unionist politician.
He served as Chairman of the Edinburgh Stock Exchange( 1885 – 87) and Chairman of the London Chamber of Commerce( 1912 – 15).
He was Senior Partner of Faithfull Begg& Co Stockbrokers in London( 1887–1913).
He was Member of Parliament for Glasgow St Rollox from 17 July 1895, to 4 October 1900.
Harriet Pye Esten
Harriet Pye Esten or Harriet Pye Scott- Waring; born Harriet Pye Bennett( 1760s? – 1865) was an English actress and briefly a theatre manager.
Miloš Zličić
Miloš Zličić( born 29 December 1999) is a Serbian football forward.
He is a younger brother of Lazar Zličić.
Vadim Vlasov
Vadim Nikolayevich Vlasov( born 19 December 1980) is a former Russian football player.
He is a younger brother of Dmitri Vlasov.
Kate Hamilton Pier
Kate Hamilton Pier (December 11, 1868 - April 1, 1931) was a lawyer.
Harriet Hamilton Pier
Harriet Hamilton Pier Simonds (April 26, 1872 - before 1945) was a lawyer in Wisconsin, United States of America.
Her mother and two sisters were also lawyers, at a time when there were only eight female lawyers in Wisconsin.

Question: Who is younger, Ferdinand Begg or Harriet Hamilton Pier?
Answer: Harriet Hamilton Pier