려나 grammar - lyeona grammar

A grammar topic of the chapter I am studying is (으)려나?"

The book explains that it is a question ending, sometimes occurs in person talking to oneself. I find this explanation not very sufficient.

I only found compounds like "(으)려나 모르다 (으)려나 보다" in other books, and only scarce source on the web talks of the simple "-(으)려나?"

Would you give me explain more about this ending?

**
The book's examples:
1.
A: 비가 올려나? 제비들이 낮게 나네.
B: 오늘 일기예보에서 비가 온다고 했어요.

2.
A: 누나가 오늘도 늦으려나?
B: 아까 회사에 일이 많아서 오늘 밤도 야근한다고 전화왔었어.

3.
A: 언제쯤 고향에 갈 수있을려나?
B: 고향에 계시는 어머님이 많이 보고 싶으시죠?

**

When speaker doesn't anticipate a response from listener, talking(mumbling) to himself , we use the ending '려나'. (but..actually..no response will hurt the speaker.)

e.g. A : 오늘 점심은 뭘 먹는 게 좋으려나? B : .......(silence) or 피자?
A : 오늘은 공부를 그만하는 것이 나으려나? B : .......(silence) or 아니.
A : 내일은 날씨가 좋으려나? B : .......(silence) or 글쎄?
A : 다음 달도 여전히 추우려나? B : .......(silence) or 설마?
A : 담배를 그만 피우는 것이 좋으려나? B : .......(silence) or 과연?

"(으)려나" = "I wonder"
비가 올려나? = I wonder if it will rain.
누구가 오늘도 늦으려나? = I wonder if someone will be late again today.
언제쯤 고향에 갈 수있을려나? = I wonder when I can visit my home town.

Thanks.

Is this ending about anticipation (추측) or asking about others' intention?

By the way, in the examples in my book

1. A: 비가 올려나? 제비들이 낮게 나네.
Why is there ㄹ after 오? But not just 오려나?

3. A: 언제쯤 고향에 갈 수있을려나?
Similarly, why ㄹ here? Not just 수있으려나?

4. (not written above) 이 선물을 민수 씨가 마음에 들어할려나?
Why ㄹ after 하? Not just 하려나?

This is not mentioned in this grammar rule.

By the way, in the examples in my book

1. A: 비가 올려나? 제비들이 낮게 나네.
Why is there ㄹ after 오? But not just 오려나?

3. A: 언제쯤 고향에 갈 수있을려나?
Similarly, why ㄹ here? Not just 수있으려나?

4. (not written above) 이 선물을 민수 씨가 마음에 들어할려나?
Why ㄹ after 하? Not just 하려나?

This is not mentioned in this grammar rule.

If you google the words, you can see they are all used, with and without "ㄹ". I don't know which way is correct. But, "갈 수 있으려나" is more acceptable than "갈 수있을려나". Because, I think, "-ㄹ 수" refers to a future event, so another "-ㄹ", which indicates a future incident, is not needed.

As Superhero1 said, the speaker does not anticipate others' responses to the statement.

Sorry for my late follow-up question, what about
1. 주말에는 골프나 치려나?
2. 제대 후에는 학교에 복학하려나?
Are they also "talking to oneself'?

1. I guess he plays golf or something during weekends?
2. I guess he will come back to school after he finishes army?

1. 주말에는 골프나 치려나?
2. 제대 후에는 학교에 복학하려나?

The sentences are missing the subjects, so it is difficult to answer your question. "1. 주말에는 골프나 치려나?" sounds like a question towards the listener. If it were "주말에는 골프를 치려나?", I would have thought that the speaker is talking to himself. I am not sure about the 2nd one. It depends on the subject. If it is "you", then it is a question towards the listener. If it is someone who is not there, then the speaker is talking to himself.

is this construction close in feeling as compared to 는지, ㄴ지, ㄹ지 ? (wondering, doubting)

this 려나 here seems vastly different from the construction of 려고 which indicates of "having intention" or "on the brink of". I am wondering if they come through different evolution but end up looking similar by accident.