How to pronounce Khannah?

Kha, like the sound when you say "cake”
nah, like the sound in the second syllable of the word "Nanna"
Now together Kha'nnah

Here it is with the Vowels capitalized

khA nnAh

The A"s have a long Vowel sound

The name is taken from the 1st book of Samuel, his mother's Hebrew name is Khannah, however it's Hannah