Loved one 一般用于大家去世的亲人或最好的朋友。
例句
Some families never adjust to the loss of a loved one.
You will be able to bid a final farewell to your loved one at the funeral.
请注意
和其他语言一样，在提到死亡时，大家会仔细考虑用什么样英语表达和词语。大家总是用比较委婉的表达譬如 to pass away 或者是 pass on 来表示某人已经去世了，口语中大家一般不需要 die 这个词来直说死亡。
It has been five years since my mother passed on.
She passed away peacefully in her sleep.
Im so sorry to hear about your dads passing.