ら

plural suffix (for people; “... and the others”), (forms a conditional clause: if, when)

ɾ a̠ → 等
noun Rare #25,401
plural suffix (for people; “... and the others”) Added directly to pronouns or nouns referring to people. Often colloquial; with words like お前, it can sound blunt.
JA: 子どもらが公園で遊んでいる。
EN: The kids are playing in the park.
Declension of 等
ら等

ドアを閉めたのは、お前らか?

Were you guys the ones who closed the door?

今の私らにはそれしかありません

That's all we have right now.

— ストーカー (1979)

ー君らが隠したものを見つけたよ

I found what you guys hid.

— ストーカー (1979)

あの子らなら

If it’s those kids...

— かぐや姫の物語 (2013)

ワシらじゃないよ!

It wasn't us!

— ロード・オブ・ザ・リング/王の帰還 (2003)

conjunction Rare #25,402
(forms a conditional clause: if, when) Usually follows た or だ, as in 食べたら (if/when someone eats).
JA: 雨が降ったら、家にいます。
EN: If it rains, I’ll stay home.

もし彼の住所を知っていたら手紙をかくだろう。

If I knew his address, I would write him a letter.

あなたはこの部屋で眠ったらいけません。

You must not sleep in this room.

家を出ようとしたら、トムが私に電話してきた。

Just as I was about to leave the house, Tom called me.

時間通りに来れないようなら、連絡ください。

If you can't make it on time, please let me know.

あの飛行機に乗っていたら、今生きていないでしょうね。

If I had been on that plane, I probably wouldn’t be alive now.

仕事から帰りがてらスーパーに行ってきた。

I stopped by the supermarket on my way home from work.

彼の住所を知っていたら、手紙を書いたのだが。

If I had known his address, I would have written him a letter.

Sounds similar to