Weird.
Boys:
- Albin (AHL-bin, German; AHL-been, Scandinavian, Polish, Slovene)
- French form is Aubin
- Ambrose (AM-brohz, English)
- other forms include: Ambroos (Dutch), Ambroise (French), Ambrus (Hungarian), Ambrogio (Italian), Ambrosio (Spanish), Emrys (Welsh)
- Aurélien (oh-rayl-YAWn, French)
- other forms include: Auréle (French), Aurel (German, Romanian, Slovak), Aurél (Hungarian), Aurelio (Spanish, Italian), Aureliusz (Polish)
- Constantine (KON-stan-teen, English)
- other forms include: Constantijn (Dutch), Constantin (French, Romanian), Costache/Costin (Romanian), Costanzo/Costantino (Italian), Konstantinos (Greek), Konstantin (German, Hungarian, Russian, Serbian), Konstanty/Konstantyn (Polish)
- Cyril (SEER-il, SIH-ril, English)
- other forms include: Ciril (Catalan, Slovenian), Cirillo (Italian), Cyrille (French), Kiril (Bulgarian, Macedonian), Kirill (Russian)
- Emil (eh-MEEL, English, EH-meel, German)
- other forms include: Émile/Emilien (French), Emilian (Romanian), Emiliano/Emilio (Italian, Portuguese, Spanish), Emilis (Lithuanian)
- Gaëtan (gah-eh-TAHN, French)
- other forms include: Caetano (Portuguese), Cayetano (Spanish), Gaetano (Italian), Kajetan (Czech, German, Polish, Slovene)
- Gustav (GOOS-tahf, Czech, German, Scandinavian)
- other forms include: Gustave (French), Gustavo (Italian, Portuguese, Spanish), Gustavs (Latvian), Gustaw (Polish), Kustaa (Finnish)
- Ishmael (ISH-mayl, English)
- other forms include: Esmail (Persian), Ismael (French, Scandinavian, Spanish), Ismail (Arabic, Bosnian, Turkish), Ismo (Finnish)
- Joachim (JOH-ah-kim, English; zhoh-ah-KEEM, French; yoh-AH-keem, German, Scandinavian, Polish)
- other forms include: Gioacchino/Gioachino (Italian), Jaakkima (Finnish), Jáchym (Czech), Joakim (Scandinavian, Serbian), Joaquim (Catalan, Portuguese), Joaquín (Spanish), Jochem (Dutch, German), Yakim (Russian)
- Marius (MAHR-ee-us, MEHR-ee-us, English; MAH-ree-oos, French, German, Romanian, Scandinavian)
- other forms include: Marijo (Croatian), Mario (Italian, Spanish), Mário (Portuguese), Marios (Greek), Mariusz (Polish)
- Rayner (RAY-ner, English)
- other forms include: Ragnar (Scandinavian), Rainer/Reiner (German, Scandinavian), Rainerio (Italian, Spanish), Rainier (French), Raniero (Italian), Reinier (Dutch)
- Urban (UR-ban, English; OOR-bahn, German, Polish, Scandinavian, Slovene)
- other forms include: Urbain (French), Orbán (Hungarian), Urbano (Italian, Spanish)
- Valentine (VAL-en-tine, English)
- other forms include: Balendin (Basque, Spanish), Balint (Hungarian), Valentijn (Dutch), Valentin (Bulgarian, Czech, French, German, Romanian, Russian, Scandinavian), Valentino (Italian), Walenty (Polish)
Girls:
- Apollonia (ah-poh-loh-NEE-ah, Greek)
- other forms include: Abelone (Danish), Apolena (Czech, Slovak), Apoliena (Slovak), Apolline (French), Apolonia (Polish), Apolónia (Portuguese)
- Beata (beh-AH-tah, Czech, Danish, German, Italian, Polish, Scandinavian, Slovak, Spanish)
- Daria (DEHR-ee-ah, English; DAR-ee-ah, Croatian, English, German, French, Italian, Polish, Spanish)
- other forms include: Darija (Croatian, Serbian, Slovene), Darya (Russian), Tarja (Finnish)
- Inga (INg-ah, Swedish; ING-gah, Croatian, Danish, German)
- Czech, Finnish, & Frisian form is Inka.
- Isadora (iz-ah-DOHR-ah, English; eez-ah-DOHR-ah, Italian, Portuguese, Swedish)
- other forms include: Isidora (Greek, Macedonian, Russian, Serbian, Spanish), Izidora (Hungarian)
- Mireille (mee-RAY, French)
- other forms include: Mireia/Mireya (Catalan, Spanish), Mirèio (Occitan), Mirela (Croatian, Romanian), Mirella (Italian, Scandinavian)
- Olga (OHL-gah, Bulgarian, Czech, German, Hungarian, Polish, Portuguese, Romanian, Russian, Scandinavian, Spanish)
- other forms include: Áile (Sami), Helga (German, Scandinavian), Hella (Scandinavian), Olgica (Croatian, Serbian), Laila (Finnish, Scandinavian)
- Ottoline (AH-toh-leen, English)
- other forms include: Oda (German, Scandinavian), Odalis/Odalys (Spanish), Odette/Odile (French), Otilia (Romanian), Ottilia (Swedish), Ottilie/Ute (German), Otylia (Polish)
- Petra (PEH-trah, Bosnian, Bulgarian, Czech, German, Greek, Hungarian, Russian, Serbian, Scandinavian, Slovak, Slovene, Spanish)
- other forms include: Perrine (French), Petroula (Greek), Piera/Pietra (Italian)
- Romana (roh-MAH-nah, Czech, Croatian, German, Italian, Polish, Slovak, Slovene)
- other forms include: Romaine (French), Romána (Hungarian), Romina (Italian, Scandinavian), Romola (Italian)
- Sabina (sah-BEE-nah, Czech, Croatian, Italian, Polish, Russian, Scandinavian, Spanish)
- other forms include: Sabien (Dutch), Sabine (French, German, Scandinavian), Savina (Italian), Szabina (Hungarian)
- Tecla (TEH-klah, Catalan, Italian, Portuguese, Spanish)
- other forms include: Thecla (Dutch), Thekla (German, Greek), Tekla (Polish, Russian,, Scandinavian)
- Zita (ZEE-tah, Czech, French, Hungarian, Italian, Latvian, Portuguese, Slovak; TSEE-tah, German)
- Polish form is Zyta.