Irish san

← Proto-Celtic *[[in]] [[sindū]]/[[sindai]] (inherited)

← Proto-Celtic *[[in]] [[sindom]]/[[sindam]] (mention)

← Irish [[ins]] [[an]] (mention)

← Old Irish [[issin]][[issind|(d)]] (inherited)

→ Irish acusan (suffix)

→ Irish iadsan (suffix)

→ Irish annsan (suffix)

→ Irish seisean (suffix)