The telegram from King Felipe and Queen Letizia of Spain was particularly poignant, sending "all our love and affection" to Aunt Lilibet (the affectionate name used by the duke for his wife) and Dear Uncle Philip.
"We shall never forget the moments that we shared with him and the legacy of service and dedication to the Crown and the United Kingdom by your side," they told the Queen.
Sweden's King Carl Gustaf was also moved, saying the duke had been "a great friend of our family for many years, a relation we have deeply valued".
Swedish royal family spokeswoman Margareta Thorgren told the BBC the king and the duke had sailed together in England, adding: "That was the start of a great friendship between them."
The Dutch royal family said they remembered Prince Philip with great respect, adding: "He dedicated his long life to the service of the British people and to his many duties and responsibilities. His lively personality made an indelible impression."
Belgium's King Philippe said he and Queen Mathilde would "always cherish the memories of our warm encounters". Prince Philip: World leaders and royals send heartfelt sympathy » | Friday, April 9, 2021
