In matters of inheritance to property, who among these Smritikars placed the widow next to the son ?

The Yajnavalkya Smriti was the first to recognise the widow (patni) as an heir: for a man who left no son, it placed the widow first in the order of succession, ahead of daughters, parents and brothers, so she came next to the son.

Manu did not clearly recognise the widow as an heir, and Brihaspati and Katyayana, while supporting her claims, came after Yajnavalkya and built on his rule.