My name is Richard and I live in the area of Cabra in Dublin , Ireland.
The area is split into two areas Cabra East and Cabra West. The names “Duignam” and “Duignan” would be pronounced Dig-nam and Dig- nan the “U” is silent. Its not a very common name and I only know of one family in the Cabra area with this name. If its of interest to you I can confirm the details and let you know. As your posting is 2001 and its now 2005 I shall wait for a reply from you first.