A question about questions

 A question about questions is bothering me.... 

there's something that makes them start with the same alphabet(s)/sound.... 

 in Hindi it's Kaun, Kyon, Kaise, Kab, Kahan, Kiska, Kisliye, Kya..... 

 in Marathi the same rule applies with K... 

so is the case with English, but almost.... Why, What, Who, Where, When ... 

then...

WHY 'HOW' is different ? 

WHAT went wrong with 'HOW' ?? 

WHO coined 'HOW', the same person or someone unconnected ??? 

WHEN was 'HOW' coined, together or separate from the 'WH' questions ???? 

WHERE can I find out about this anamoly of 'HOW'????? 

and most importantly 'HOW' ??????