Your first name of Sineaid gives you an independent, serious, reticent, and studious nature. You are very conscientious and competent in all that you do. An intellectual, you have a deep appreciation for art, music, literature, and all the phenomena of nature. The people who mean the most to you are those who can offer you intellectual companionship. You are a thoughtful, analytical person, and you know your own mind, even though you may not speak it. It is only when you are among people who understand your deeper nature that you can really be yourself. You express your thoughts and feelings best through writing rather than verbally. At such times you can withdraw into a mood, and may not even speak to others. Physically, any weaknesses in your health would centre in the heart, lungs, or bronchial organs. Worry and mental depression could be problems in your life.