His birth certificate lists name as Bryan Albert Ritchie-https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1891/02381/1888588.pdfSince he was in the Royal Navy the couple could have lived anywhere depending on where he was stationed. May not be the same man but there is an English marriage for a Bryan A. Ritchie in 1931 in Portsmouth district. Also a death in Portsmouth district for a Bryan A. Ritchie in 1958 (age 66 which fits with above birth record). There is 1 birth for a possible child in 1936 but won't put the details here in case she's still alive. See www.freebmd.org.uk to see the indexes yourself