AL-iss-der
That's how I pronounce both of them. And I really like them/it.
And it would totally fit with those siblings - although I think
Rufus is a bit of a misfit in there.
Barnaby,
Theodora and
Alasdair are particularly great together.
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589
He is becoming greater, I am becoming less
Bits of the journey here:
http://jodifriesen.blogspot.ca/And some family cuteness here:
https://www.flickr.com/photos/41705228@N08/