For what it's worth, the official explanation from its namer is this [1]:
"Jeff [Bezos, the CEO] wanted to talk about
the future of reading, but in a small, not
braggadocio way. We didn't want it to be
'techie' or trite, and we wanted it to be
memorable, and meaningful in many ways of
expression, from 'I love curling up with
my Kindle to read a new book' to 'When I'm
stuck in the airport or on line, I can
Kindle my newspaper, favorite blogs or
half a dozen books I'm reading.'" ...
Kindle means to set alight or start to
burn, to arouse or be aroused, to make or
become bright. The word’s roots are from
the Old Norse word kyndill, meaning
Candle. “I verified that it had deep roots
in literature,” adds Hibma. “From
Voltaire: ‘The instruction we find in
books is like fire. We fetch it from our
neighbours, kindle it at home, communicate
it to others and it becomes the property
of all.’”
[1]
http://www.printmag.com/article/who-named-the-kindle-and-why...