My wife and I spent two nights away at a beach holiday town. This morning (Easter Day) we attended a dawn service in a park overlooking the beach. During the service, the sun rose, but the effect was diluted slightly by some small clouds on the eastern horizon. I couldn’t take any photos because I was meant to be concentrating on the service.
Probably inevitably, I got thinking about the coincidence of sun and son in English, especially in close conjunction with rising or risen. (See also sun/Sun/son/Son of righteousness.) These two words are similar in the major Germanic languages, but English seems to be the only one in which the two words are homophones: compare German Sonne and Sohn, Dutch zon and zoon, Danish sol and søn, Norwegian sol and sønn and Swedish Sol and son (Google Translate). Further, the two words have been similar for as long as written sources are available and have been reconstructed in proto-Indo-European as *séh₂wl̥ ~ *sh₂wéns and *suHnús. Are they related even further back? Intriguingly, Etymology.com relates son to a verb meaning “to give birth”, probably in a passive form of “having been given birth”. Unfortunately, it does not include an ultimate meaning for sun, but the relationship with “to give birth” is obvious. The answer may be in some specialised source of PIE etymology. I’ll have to leave it there, though.
Compare Latin sol and filius, which is related to a verb meaning to suck, and the two words in any other language you know, in my case Korean 태양 (tae-yang) and 아들 (a-deul).