Sentence ending でな


> レモン・キャンディーじゃよ。マグルの食べる甘いものじゃが、わしゃ、これが好き **でな** 。  
>  A lemon sweet. It's a sweet thing that muggles eat. I like this ???

I understand the concept of role language for portraying different kinds of
character. The speaker (professor Dumbledore) is an old man so he ends
sentences with じゃ instead of だ for example.  
I'm assuming that the ending でな is something like this.

The English translation is "I'm rather fond of them" (actually "it's a muggle
sweet I'm rather fond of"). So, I can't see what function でな is performing.

Maybe it's not role language. Maybe it's just すきだ->すきで implying an unfinished
sentence, with the sentence ending particle な on the end (a particle I've
never got to grips with). I can't see why the translator would do this though.

In either case I can't understand what's going on here.




This でな is indeed the te-form of だ, followed by な, a masculine sentence-final
particle.

A sentence-end で [can have several different
roles](https://japanese.stackexchange.com/a/60764/5010). Here, it may be a
reason marker (i.e., explaining to someone why he has a sweet), in which case
the combination of で + な roughly corresponds to "you know" in English. Or it
may be a simple "continuation marker". As [this
answer](https://japanese.stackexchange.com/q/54376/5010) suggests, this is a
common pattern in Japanese, and this use of て/で can make the sentence sound
simply more natural.




This でな is indeed the te-form of だ, followed by な, a masculine sentence-final
particle.

A sentence-end で [can have several different
roles](https://japanese.stackexchange.com/a/60764/5010). Here, it may be a
reason marker (i.e., explaining to someone why he has a sweet), in which case
the combination of で + な roughly corresponds to "you know" in English. Or it
may be a simple "continuation marker". As [this
answer](https://japanese.stackexchange.com/q/54376/5010) suggests, this is a
common pattern in Japanese, and this use of て/で can make the sentence sound
simply more natural.

