Imagine I have three brothers older than me e.g. Jack(30), Isac(28) and Noah(27). How can I refer to them? For instance may I refer to jack as my oldest/biggest brother? May I call Isac my second older brother. It seems a bit not-English to me! and to Noah as my third older brother or my youngest older bro.
How would you refer to your family member older than you? Do the rules appply for younger brothers as well?