Here are the Russian Orthodox saints that start with the letter "N," with their feastdays where available:
- Nadezhda
- Narcissus, Patriarch of Jerusalem, August 7
- Natalia of Nicomedia, August 26
- Nektarios of Pentapolis, November 9
- Nektary of Optina
- Neot of Cornwall
- Nestabius of Gaza, September 21
- Nestor the Chronicler, October 27
- Nestor the Unlearned of the Far Caves, October 29
- Nicephorus of Caesarea, November 13
- Nicephorus of Vazhe Lake, February 9
- Nicetas the Martyr
- Nicholas, New Martyr, February 9
- Nicholas II the Russian Tsar-Martyr
- Nicholas Basdanis the New Martyr, March 17
- Nicholas of Constantinople, February 14
- Nicholas the Wonderworker of Myra in Lycia, December 6, May 20, December 7
- Nicholas Karamanos, December 6
- Nicholas Kochanov, July 27
- Nicholas of Lesbos, Bright Tuesday
- Nicholas of Metsovan, May 16
- Nicholas of Mitylene, April 24
- Nicholas Salos of Pskov, February 28
- Nicholas Svyatosha, October 14
- Nicholas II
- Nicholas Velimorovic of Zica
- Nicholas of Vounenissa, May 9
- Nicodemos of Meteora, August 16
- Nifont of the Kiev Caves, April 8
- Nika
- Niketas the Hagiorite, February 19
- Niketas the New Martyr, April 4
- Niketas the Great Martyr, September 15
- Niketas the Great of Nisiros, June 21
- Nikita of the Kiev caves, December 11
- Nikodim the Prosphora Baker of the Kiev Caves, October 31
- Nikon, Patriarch of Moscow
- Nilus the Myrrh-Streaming, November 12
- Nilus of Sinai, November 12
- Nilus of Sora, April 7 and May 7
- Nilus the Elder of the St. Silus Hermitage
- Nina the Enlightener of Georgia, January 14
- Nine Martyred Children of Kola, February 22
- Nonna the deaconess
Source: http://www.gnisios.narod.ru/lives.html