The most common names are given phonetically as well as according to the guidelines in Webster's Encyclopedic Unabridged Dictionary of the English Language. Less common Finnish words are simply given phonetically.
Väinämöinen. Væinæmainen. Phonetic: Vi-nuh-moy-nen. Väi- (rhymes with why), nä- (rhymes with luh), möi- (rhymes with boy), nen (rhymes with pen). No accent. He is also sometimes called Väino.
Lemminkäinen. Lemminkæinen. Lemmin-ki-nen. Lemmin- (sounds like the fruit lemon), käi- (rhymes with why), nen (rhymes with pen). No accent.
Ilmarinen. Ilmurinen. Il-mah-ree-nen. Il- (sounds like ill), ma- (sounds like muh), ri- (rhymes with see), nen (rhymes with pen). The italics indicate the accent is on the third syllable.
Kalevala. Kulevulu. Kah-leh-vah-luh. Soft accent on first syllable.
Kaleva. Kulevu. Kah-leh-vah.
Louhi. Low-hee.
Aino. Uino. I-no.
Marjatta. Muryuttu. Mar-yah-tah.
Tapio. Tupio. Tah-pee-oh
Tuoni. Twah-nee
Tuonela. Twah-neh-lah
Manala. Munulu. Mah-nah-lah
Joukahainen. Yo-kuh-hi-nen
Pohjola. Poh-yo-lah. Also called Pohja.
Sampo. Sahm-poh. (Sahm rhymes with bomb; poh rhymes with go.)
Ilmatar. Il-mah-tar
Kyllikki. Kyoo-luh-kee
Ahti. Ah-tee
Kaukomieli. Kow-kuh-mee-lee
Untamo. Oon-tah-mo
Kalervo. Kah-lair-vo
Hiisi. Hee-see
Kullervo. Koo-lair-vo
Ukko. Oo-ko
Patoinen Poika. Pah-toy-nen Poy-kah
Sampsa Pellervoinen. Sahmp-sah Peller-voy-nen
Jumala. Yoo-mah-lah
Suomi. Swoh-mee.
Otava. Oh-tah-vah.