Two short translations from English to Welsh please?

Question

How to say in Welsh the equivalent of :

1. It's a small world

2. Welcome home

I asked this question a couple of hours back but though the Question screen lists one answer, none shows up

Answer 1

1.Mae'n fyd bach

2. Croeso gartref / nôl

The answerer above is more dialectal than standard but still correct,

Croeso nôl means - welcome back and not welcome home but obviously it's similar.  

Answer 2

1. Mae o'n byd fach

2. Croeso yn ôl