LL – Y
In Castilian Spanish, LL is considered a single letter, which is pronounced like an English "Y" at the start of a word.
For example, you would pronounce llave (key) as "yah-beh" and pollo (chicken) as "poh-yoh".
The letters LL are pronounced Y
To remember this we use the following mnemonic:
The llama (LL) was playing with her yo-yos (LL=Y).