Matthias' widow Barbe Stoupy inherited the bank in 1749: {{cquote|Madame de Netitine had no trouble succeeding her husband.
On 19 July 1749, an act signed by the marquis de Herzelles and counsellor Papejans de Morchoven confirmed her in her position as a "suitable and capable person" to occupy it after the decease of the titular deceased: Stahremberg, convinced of the stability of the bank, advised, in the common interest, to leave things as they were.
By right, Madame de Walckiers succeeded her mother as banker to the Court since she was the eldest[1][2]The Nettine bank was the most important in the Spanish Netherlands (later known as the Austrian Netherlands): Only the house founded by Matthias de Nettine had sufficient scope for delivering public operations.
[4] On 16 January 1784 Joseph Édouard de Walckiers was made counsellor-receiver-general of finances for the Austrian Netherlands[5] In 1788 he built Belvédère Castle to designs by Antoine Payen the Elder - in the 20th century this became prince Albert's residence.
He fled to Hamburg but was removed from the list of émigrés on 29 May 1800 and returned to France under the French Directory, dying in Paris in 1837, more or less ruined.