Adrianus Herman (Ad) van Luyn, SDB, (born 10 August 1935) is a Dutch prelate of the Catholic Church.

Van Luyn was born in Groningen and attended the seminary of the Salesians in Ugchelen.

He taught for a time at the Salesians' school attached to the Don Rua monastery in 's-Heerenberg.

[1] Pope John Paul II named him Bishop of Rotterdam on 27 November 1993 and he was installed in 12 February 1994.

In that role in October 2009 he welcomed the Irish vote ratifying the Treaty of Lisbon.