Boudicca (from the Proto-Celtic boudi, "victory") was the Iceni queen of eastern Britain who led the largest indigenous revolt against the Roman Empire (60-61 CE). After Roman officials flogged her and raped her daughters following her husband's death, she rallied a coalition of British tribes and sacked Camulodunum (Colchester), Londinium (London), and Verulamium (St Albans) — burning all three to the ground and killing an estimated 70,000-80,000 Romans and pro-Roman Britons. Her revolt was the closest the Britons ever came to expelling Rome.
Subject of Tacitus's Annals (14.29-39) and a famous bronze statue on Westminster Bridge in London.
Boudicca does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Boudicca reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.