Name variants

Derrick I Cleves

Derrick I Heinsberg

Derrick I Heinsberg-Valkenburg

Derrick I of Cleves

Derrick I of Heinsberg

Derrick I of Heinsberg-Valkenburg

Derrick I of Valkenburg

Derrick I Valkenburg

Dietrich I Cleves

Dietrich I of Cleves

Dietrich I of Heinsberg

Dietrich I of Heinsberg-Valkenburg

Dietrich I of Valkenburg

Theoderich I Cleves

Theoderich I Heinsberg

Theoderich I Heinsberg-Valkenburg

Theoderich I of Cleves

Theoderich I of Heinsberg

Theoderich I of Heinsberg-Valkenburg

Theoderich I of Valkenburg

Theoderich I Valkenburg

Theodoric I Cleves

Theodoric I Heinsberg

Theodoric I Heinsberg-Valkenburg

Theodoric I of Cleves

Theodoric I of Heinsberg

Theodoric I of Heinsberg-Valkenburg

Theodoric I of Valkenburg

Theodoric I Valkenburg

Dietrich I Heinsberg

Dietrich I Heinsberg-Valkenburg

Dietrich I Kleve

Dietrich I Valkenburg

Dietrich I van Heinsberg

Dietrich I van Heinsberg-Valkenburg

Dietrich I van Valkenburg

Dietrich I von Kleve