Here rests our dear mother Anna Maria de Gier – van Leeuwen, born 3 October 1875, died 25 March 1943.
I found additional genealogical data in wiewaswie.nl: Anna Maria van Leeuwen, daughter of Gerrit van Leeuwen and Weintje Spithoven, was born on 4 October 1875 in Langbroek. She married Hubertus de Gier, from Wijk bij Duurstede, son of Christiaan de Gier and Grada Cornelisse, on 23 April 1903 in Langbroek. Hubertus died died 22 March 1940 in Wijk bij Duurstede. Anna Maria died on 25 March 1943 in Wijk bij Duurstede.
Note that the birth date on the stone is a day off, according to the wiewaswie.nl. I did not check which one is the correct date.