Looking for David William Castle Bush Contractor IN Coromandel New Zealand

David Castle was born in 1865 and spent much of his life in the Coromandel working in kauri logging. He married Ann Jane Brady in Auckland in 1893. She died in 1925.He died in 1935 - in Paihia. I am looking for their descendants, most of whom were born in Auckland. A daughter Catherine Georgina married a Fitzpatrick. Is anyone else researching this family? I'd be pleased to make contact.