Alfonso Leng was born on February 11, 1894.
Alfonso Herrera was born on August 28, 1983.
Alfonso Salmeron was born on September 8, 1515.
Alfonso Ribeiro was born on September 21, 1971.
Alfonso García Robles was born on March 20, 1911.
Alfonso Ferrero la Marmora was born on November 18, 1804.
Yes, two possessives in that case would be correct. Alfonso has a grandmother, and the grandmother has a birthday.
Alfonso Soriano was born on January 7, 1976.
Alfonso Arau was born on January 11, 1932.
Alfonso Herrera was born on August 28, 1983.
Kristian Alfonso was born on September 5, 1963.
Alfonso Salmeron was born on September 8, 1515.
Alfonso Ribeiro was born on September 21, 1971.
Alfonso Cuarón was born on November 28, 1961.
Alfonso Ferrabosco I was born on January 18, 1543.
Giovanni Alfonso Borelli was born on January 28, 1608.
Alfonso XIII of Spain was born on May 17, 1886.
Alfonso de Portago was born on October 11, 1928.