What does "ああ　こいつ　ひろわれっ子なんで　かーちゃんいないんだ”


I have problem understanding the following scene from a manga (Yotsuba&! vol.
1 pg. 196):

> Person A: Oh yeah, what about Yotsubas mother?
>
> Person B: ああ こいつ ひろわれっ子なんで かーちゃんいないんだ

(I put spaces where line breaks are in the manga).

I understand parts of that sentence but can't find what the phrase in the
middle of it means ("ひろわれっ子なんで"). As the character for child is the only kanji
I have trouble even knowing how many words are in there, and dictionaries
aren't of much help. I found a translation of the manga online and they claim
it means

> Oh, she was an abandoned child so she doesn't have a mom

but when I tried searching "abandon child", It appears the verb "捨てる" is used
(like for example here: 彼女は自分の子供たちを捨てた). Could you help me understand what
exactly is said in there?




ひろわれっ子 is a variation of ひろわれた子 like 江戸っ子. ひろわれる is a passive form of ひろう and
it means " be taken in" and "be picked up".

In fact, she is a child who was abandoned and was taken in(picked up).




ひろわれっ子 is a variation of ひろわれた子 like 江戸っ子. ひろわれる is a passive form of ひろう and
it means " be taken in" and "be picked up".

In fact, she is a child who was abandoned and was taken in(picked up).

