Found a picture of the extended Danish Royal Family in gala jewels for, I think, Christian X jubilee in 1937. While it includes a lot of familiar tiaras and jewels there are a few that I don't recognize
https://kgl-fotosamling.kongernessa...4278/viewmode=infoview/qsr=prinsesse ingeborg
starting at the bottom left
GD Alexandra of Mecklenburg-Schwerin - recently sold Faberge tiara
CP Ingrid - Ruby Parure currently worn by CP Mary
Queen Alexandrine - Fringe tiara currently worn by Count Inglof's wife Susie
Princess Ingeborg of Sweden - Leutchenburg Emerald Parure now in Norway
Princess Helena - tiara made from Queen Desiree's Ears of Wheat which has been broken up
Princess Dagmar, Mrs. Castenskiold - ?, looks a bit makeshift
Princess Caroline-Mathilde - Q Alexandrine's Russian Sapphire Tiara, recently sold
Princess Thyra - a little blurry but I think Q Josephine's Diamond Tiara, now in Norway
Princess Feodora - unknown star tiara
Countess Mathilde, Princess Aage - ?
Princess Margaret of Bourbon-Parma - ?
Princess Viggo - reworked Princess Marie Opal Tiara, last worn by Countess Ruth
Princes Margarethe - Princess Marie's Floral Loop Tiara, sold