Kentico - Show sibling document name on the parent repeater

I got the following tree structure.I have a repeater on Podcast page and need to display the latest sibiling document name on each item on the repeater. So for example, I will have the following in the repeaterMHPN Presents Ageing Well - Latest: Episod 1MHPN Presents Trauma and Resilience - Latest: Trauma and Resilience: Trauma, a history