Hi, I'm new here, after browsing some of the interesting postings and articles. I'm thinking maybe some of you might have an answer to a question I have had for some time. Here is the scenario, step by step:

1. My mother was born in Hong Kong in 1925. Both her parents were Spanish nationals.
2. She was delivered by a midwife, in a hotel in Kowloon. Her birth was registered in Hong Kong about two weeks after she was born.
3. She grew up in Manila, in the Philippines, with her parents, brothers, and sisters.
4. After World War II, my father, an American who was working there, met and married her. I was born in Manila, in 1949. I had American nationality by my American father.
5. A month after my birth, we moved to the USA. My mother became a naturalized American citizen.
6. Prior to her naturalization, I understand she was a Spanish national, but that she also had British nationality by being born in Hong Kong.
5. In a safe deposit box, I have my mother's Spanish passport, and also her British passport, which is stamped, "British Subject: Citizen of the United Kingdom and Colonies". It was issued to her in 1951, in Los Angeles, before her naturalization as an American citizen.

My question: would I and my siblings have basis to claim British nationality, because of my mother having been born in Hong Kong in 1925?

Issues of nationality seem, per the reading I've been doing on the subject, very complex, and to involve multiple changes over the years. I think I'm understating the obvious, with that comment.

Many thanks to to any and all who can help me sort this out!

Thank you very much for clearing that up for me. I appreciate your clear assessment and response.

I have, but if I correctly understand what I've been reading on that topic, Spain doesn't allow dual citizenship unless your other nationality is from a former Spanish colony, e.g. Mexico, or a Latin American country. Philippines doesn't impart nationality on basis of being born there, of non-Philippine parents, so that avenue seems to be a non-starter.

So, I'm happy to be satisfied with my current citizenship status, while appreciating my multi-cultural family legacy. Thank you again for your help.

When you apply for the Spanish citizenship, the Spaniards will have you click/sign/make a statement saying you renounce your other citizenship to them, not to your own country in whatever that country’s formal process for doing so is. The Spaniards will then consider you to be only Spanish in a Spanish context. Depending on ones other nationality, it might not actually be considered a renunciation in the eyes of the other country (the USA, for example). If one is American, you can only renounce your citizenship to the American government in a defined process. You can look at this online in more detail.