Was heißt »zufälligerweise« auf Englisch?

Das Adverb »zufälligerweise« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Sie kennen nicht zufälligerweise einen Herrn namens Braun?: Do you happen to know a man by the name of Brown?
Wir befanden uns zu jener Zeit zufälligerweise in Hokkaido.: We happened to be in Hokkaido then.
Ich habe heute zufälligerweise Geburtstag.: It so happens that today is my birthday.
Haben Sie zufälligerweise irgendwelche Fotos von Tom?: Do you happen to have any photographs of Tom?
Hast du es zufälligerweise?: Do you have it by any chance?
Kennt ihr zufälligerweise Tom?: Do you happen to know Tom?

The vase which Mary accidentally dropped and smashed had belonged to Tom's great-grandmother. It had been a family heirloom.
He accidentally got on the wrong train.
What would happen if two Toms accidentally bumped into each other?
Tom opened his car door with a little too much force and accidentally dinged the car parked next to him.
Another hunter accidentally killed Tom while he was out hunting.
He shot himself in the foot accidentally.
He accidentally shot himself in the foot.
He shot himself in the leg accidentally.
Tom accidentally deleted Mary's message.
He accidentally shot himself.
I accidentally spilled coffee on my computer's keyboard.
Mary accidentally brushed Tom's shoulder.
Have I accidentally created a magical elixir?
Tom and Mary accidentally locked themselves in the wine cellar.
His hand accidentally brushed against her leg.
Tom accidentally pressed the quickload key instead of the quicksave key.
When I was little I accidentally stepped on an earthworm.
Tom accidentally dropped an egg on the floor.
Melanie had accidentally killed a fly.
Tom accidentally cracked his phone's screen.