Thank you, hm !
I found some dictionary entries for "ayah" ... but none mentions a masculine form of the word (except for Portuguese) ... and all of them say that it's mostly used in Indian English ... as, among others :
A nursemaid or nanny employed by Europeans in India or another former British territory.
Anglo-Indian, from Portuguese aia ‘nurse’, feminine of aio ‘tutor’.
ayah in British English
(in the East, Africa, and other parts of the former British Empire) a maidservant, nursemaid, or governess, esp one of Indian or Malay origin
Collins English Dictionary. Copyright © HarperCollins Publishers
C18: from Hindi āyā, from Portuguese aia, from Latin avia grandmother ...