Martha is from the Aramaic Marta (lady, mistress of the house). In the Gospel of Luke, Martha of Bethany was the sister of Lazarus and Mary who busied herself with hospitality while her sister sat at Jesus's feet — Jesus's gentle admonition ("Martha, Martha, you are anxious and troubled about many things") gave the English language its archetype of the busy hostess. Martha Graham (1894-1991) was the American dancer-choreographer who founded modern dance; Martha Washington (1731-1802) was the first First Lady of the United States.
Subject of Sasha Waltz's Martha (2006) and many Christian devotional works.
In Pythagorean numerology the letters of Martha reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.