What does this eagle symbol/crest mean in Re:Zero?


This symbol is seen on Subaru's cape. Does it represent a lineage or what? Why
is Subaru wearing this?

[![enter image description
here](https://i.stack.imgur.com/R7v6n.png)](https://i.stack.imgur.com/R7v6n.png)

Update: It's not the same as the symbol on the royal selection insignia/badge:
[![enter image description
here](https://i.stack.imgur.com/o5YEX.png)](https://i.stack.imgur.com/o5YEX.png)




It's the same symbol as the one on Emilia's outfit. Was this when Subaru was
wearing Emilia's cloak?

[![image](https://i.stack.imgur.com/r2YNO.png)](https://i.stack.imgur.com/r2YNO.png)

