From the Telegraph and Times of 22 September 2018: FRANKOPAN - Prince Louis Nicholas Anthony Doimi de Frankopan Subic Zrinski, Count de Lupis Radossio de Tolentis, husband to Ingrid, father to Paola, Peter, Christina, Nicholas and Lawrence, grandfather to Katarina, Flora, Francis, Luke, Albert, Leopold, Louis, Hildegard, Lucia, Leonardo, Tekla, Conrad, Bartholomew, Honor and Sophia. A Dalmatian who loved Croatia. Died in Zagreb Wednesday 19th 2018 the day of St Gennaro.
He was s of Pietro DE FRANKOPAN and Marica FAROLFI. He m (Thyra) Ingrid Hildegard DETTER (b 1936), a Swedish-born lawyer practising in Britain, and had 3 sons and 2 daus as above. His elder dau Paolo Luisa Maria (b 1969) who m 2006 Lord Nicholas Charles Edward Jonathan WINDSOR (b 1970) younger s of The Duke of KENT (b 1934) and Katharine Lucy Mary WORSLEY (b 1933), scion of the Bts of that name, and had 3 sons mentioned above (Albert b 2007, Leopold b 2009 and Louis b 2014).
Extract from Dr Detter's Wikipedia entry:
[He] was born Louis Doimi de Lupis and later controversially added the names of Šubić, Zrinski and Frankopan under British Civil law and the title of Prince, having previously adopted the title of Count. While the Doimi de Lupis family were granted a knighthood by Emperor Franz Joseph I in 1855 and 1865, their right to use the names of several Croatian medieval noble families and the title of Prince (a royal title never held by any of the mentioned families, who were in Latin, Croatian, Hungarian and Italian historical documents styled as Counts of Bribir (Šubić), Counts of Zrin (Zrinski) and Counts of Krk (Frankopan) has been highly disputed. The Croatian Nobility Association expelled the Doimi de Lupis family from their membership calling the name reverting a falsification while John Kennedy, editor of directory of Europe's royalty and nobility Almanach de Gotha, stated that the use of the name Frankopan by Doimi de Lupis family is "more aspirational than inherited".
https://en.wikipedia.org/wiki/Ingrid_Detter_de_Frankopan