6 faced
rudraksha represents
'Sawmi Kartikeya'
a six headed God
 
3 faced rudraksha represents
'Agni' God of fire
12 faced rudraksha represents
'Surya', .... Sun God

7 faced represents 'seven notes in music'  
15 faced
rudraksha
14 faced
rudraksha represents
'Hanuman ji
9 faced
'Gauri-Shankar' naturally born twins
 
 
17 faced rudraksha
no reference available
6 faced rudraksha 'Kartikeya Swamy' 5 faced
rudraksha represents 'Kalagni i.e. fire of death'